Of course you can say the obvious answers like Anderson, GSP, JBJ, etc. But I'm looking for the underrated ones.
For me it's Cerrone at the top, followed by BJ.
List em. 
Shogun!!!
Chocolate Al 
Cub Swanson, Miguel Torres, Mayhem, Carwin,Palhares,Koch
RJJH - BispingI don't think I've played with bisping or was coherent enough to remember lol. I'm gonna try using him right now.
Aldo is ridiculous,pride nog,,jds is much better than in 2010,mighty mouse,chael
Shoguns got that great lunging hook-low kick combo that can be effective
The people sayin Chuck Liddell were right. Also charles olivera, rory, carwin, goodridge, pettis, Munoz.
Forgot pride Cro Cop. He's a fuckin beast.
Korean Zombie
I randomed Court Mcgee the other day and was actually kicking some major ass. Do you guys play with equalized stats or what?
Joe Lauzon is awesome in that game, my favorite character.
George Roop has ridiculous reach for his weight class.
Rashad is money but short, same with Paul Harris.
Marquardt isn't someone to get "testy" with either
Pettis is another good one with a sick all around game
Jim Miller is good in that game with jacked up defensive stats
renan barao
rory mcdonald
brian stann
rashad evans
little nog
big nog
mir
wand
vitor belfort
lyoto machida
alan belcher
rumble
carlos condit
roy nelson
travis brown
john hathaway
sam stout
anthony pettis
chad mendes
diego nunes
korean zombie
ken flo
mighty mouse
miguel torres
melvin guillard
phil davis
ubereem
Miguel Torres
Randleman fucks me up on the regular
Sean Mcorckle is seriously overpowered in the game.
nate marquart
bornop - HendoThis
Don Fry
Big Daddy
Paul Harris is beast on the ground and standing in the game
Created fighter followed by Anderson silva