I'd say that they were meant to have similar playstyles. They're supposed to the balanced pick up and play guys with little difficulty. And I don't know exactly what your playstyle is so I'll suggest Hitomi and Hayabusa.
I don't think Kasumi is for me bacause I felt uncomfortable being in the opponents face all the time. So I guess I prefer being mid/long range? I would like the character to have some mixup ability and be good at whiff punishing?