I use Lyn- Her Speed, Luck, and Critical make her the focal point of all my teams.
Nino- Somehow all my mages and sages die during the course of the game. :(
Priscilla- She has a lot of Speed and Luck, though not much power. She is an excellent healer.
Rebecca- Wil can't dodge at all, Rath is not much better (I only use him for Lyn's supports).
Matthew- His speed usually caps out for me at level thirteen. Plus, give him an energy ring and he suddenly has strength.
Guy- Not much use as a Myrmidon. When promoted though, he can make great use of everything but a Runesword. Him with a Light Brand is a very good combination, because it makes him powerful, and he criticals alot with it. (not counting natural bonuses)
Florina- She is possibly the best flyer in the game.
Lucius- When he doesn't die.
Hawkeye- Okay, I know he isn't the best, but you have to admit that Dorcas, Bartre, Dart, and Geitz enjoy dying at the worst possible moment (like when you're just about to finish a really hard chapter).
Actually, my elite team is almost always Matthew, Lyn, Priscilla, and Guy.