Dante - Probably the best GS'er overall (from what i've seen seen atleast) does well with lag/delay.
Thallen - Solid always but dresses horrible, can play defensive or offensive and have positive results 9 out of 10 times.
Sarah - Sure she delays but still is probably better than 95% of other players.
Ares - Usually clutch in tournaments and doesn't really get rusty, probably the most unique sparrer.
MaxyMax - Plays extremely defensive and probably a bit underrated, but does very well vs laggers/most top players.
Subs:
David - Always a top sparrer, not sure how well he does well in a laggy environment but i'd imagine he can adapt very well. He doesn't play enough so I put him as a sub.
Jack (WAR) - Definitely one of the best, but I haven't seen him in 5 vs 5's so I put him as a sub as well.