On another note.. As a Leifang player, I'll list her, as I think she matches up. Just my opinion. Some of them I have not investigated, but I base them on personal experience. Not the best way, but whatever.
Leifang VS
Akira 6-4: Akira heavily relies on punches. Fang's punch parry can deal with most of them. General low punching with Akira is also not really recommended. It'll become predictable, and Leifang will simply do a low advanced hold to punish. Akira's offense must come almost exclusively from his grabs.
Alpha 4-6: Alpha can space her out easily, and Leifang being crappy at long range, she'll have a lot of trouble keeping up. She has to wait for Alpha to close the gap. Leifang has one main tool to deal with Alpha, and that's her mid kick hold, which is not that easy to land against a good Alpha player. Speed wise, Alpha has the advantage as well. Leifang's OH game is kind of nullified when Alpha has so many attacks that put her in air state.
Ayane 5-5: Kind of a toss up. Up close, Leifang can probably dominate due to her parries and crushes. Although Ayane has her fair share of evasive moves as well. At long range, Leifang is pretty much at Ayane's mercy.
Bass 6-4: Leifang can dominate with her speed, and Bass can't exactly turtle either since her grabs/OHs are pretty good. She still needs to be careful about holding though, since Bass' grabs are very damaging.
Bayman 6-4: They both have great defensive options, but Leifang has the speed advantage. Bayman's tankroll is slow enough that it can still be hit by K2K or 4KK. So main thing to watch out for are the grabs/OHs for Leifang. But she has those too.
Brad 6-4: Leifang has low OHs, she has her mid kick hold, she has the speed, she has low crushes. Brad only has space control and confusion.
Christie 5-5: Christie dominates the spacing. She also has great kicks, so Leifang's Unshu is not reliable here. Fang does have the ability to shut down JAK though, although not in the most efficient way. Also, mid kicks are dangerous for Christie. And Leifang is great on defense, so Christie's speed advantage is less great. Seems to even out pretty well.
Eliot 6-4: Unshu parry plus mid kick hold. That is all.
Gen Fu 5-5: They both kind of struggle at long range, so that even out. Gen Fu outspeeds up close, but, relies a lot on punches, which makes Leifang's unshu useful. Gen Fu's mid kick launcher is only sidestepable when held, so, Leifang's mid kick hold damage is shut down.. Both have parries... All seems pretty even to me.
Hayate 5-5: Long range nightmare for Leifang. Up close he's not really a problem for the most part. But most of his tools are long range. If Hayate gets any chance to space, Leifang will have trouble shutting him down.
Helena 5.5-4.5: Although Leifang has low OHs, chances are small that she can land one. We all know how Helena plays in this game. It's hard to get a proper hold in when she's all over you. The tide can turn easily in the match, but, Leifang has a slight advantage due to her versatility.
Hitomi 6-4: Leifang has the advantage due to her crushes. Her parries and unshu also pose a problem for Hitomi. Mid kick defense is pretty equal, since they both can get a bunch of damage from a correct advanced hold. Hitomi has better long range tools, but, Leifang's defenses seem to work well against her tools.
Jann Lee 5-5: The space king. Yeah. That's an issue. Due to his nerfs however, the matchup became pretty even.
Kasumi 5-5: Kasumi's kicks are not the best, so, that leaves her quite vulnerable to Leifang's unshu shenanigans. On the flip side, mid kick holds are unlikely to happen, except air ones, which don't give as much damage. One of Leifang's major damage tools therefore is gone. Leifang's OHs are also a risk due to Kasumi's many air states. The highest risk for Leifang are the low attacks of Kasumi. You can't get too eager with her parries, or you'll get punished.
Kokoro 6-4: Leifang's main long range weakness is kind of nullified here, since Kokoro doesn't have any kicks to close the distance gap. Other than that, Leifang pretty much has superior tools across the board, although Kokoro's stuns are superior.
Lisa 5-5: Yes, Leifang can have the advantage on close range, but, Lisa spaces so well, that Leifang is left to guess a lot more than against most of the rest of the cast. Lisa's grabs do a LOT of damage too.
Mila 5-5: I honestly have no idea, so I left it like this. Mila is another spacer. But, to close the gap, she needs to use mid kicks a lot. Up close, fast punches are fairly easy to deal with for Leifang. Mila's OH will always remain something annoying, but, it's not considered a big advantage by any means..
Pai 5-5: Pai is really underrated. She has so many mixups, and great frame advantage moves. Combined with her speed, she can easily dominate. She probably has the most sit down stuns of any character in the game. Pai can simply go toe to toe with Leifang. The one who outguesses/outreads the other player, wins.
Rig 6-4: Leifang's crushes are enough to deal with him in general. For that, Rig has to be on the offensive though. In general, when Leifang attacks a spacing Rig, she'll get hit in the face. What doesn't work is her unshu parry and OHs. What still works great is her crushes, mid parry, and her mix ups.
Ryu 5-5: Same old story regarding long range vs short range, and high dmg mid kick hold vs Izuna.
Sarah 4-6: Sarah is too good. Great spacing, great crushes, superior mixups...
Tina 4.5-5.5: Tina's grabs do too much damage. Leifang can't hold/parry like she's used to. Tina's crushes are also good enough to disrupt most of her things.
Zack 7-3: Zack doesn't have many tools to deal with Leifang's versatility. Mid kicks are risky, his stance can be low OHed, his punches can be parried, lots of his moves crushed, and his long range isn't too great either...