gotta go with the limits:
1.) cloud (obviously)
2.) barret (hehe... catastrophe)
3.) cid (highwind)

I use to have tifa instead of cid, but since you can mess up in tifa's limit (and didn't feel like doing the whole slot thing), cid becomes my third choice with his awesome highwind limit break.

Yeah, so i agree with Hal, but to be honest, I like cait sith and nanaki (my favorite character, surprisingly...) if it was favorite party, not the strongest party. NANAKI IS THE BEST!!