Yes you can. Big men can be picked in the starting roster for a lot of teams. its actually a good idea to do so to improve the chances of them getting an MVP award and leveling up.
Skaven can have a rat ogre
Humans get an ogre
Goblins can have 2 trolls
Wood elves get the treeman
chaos pact can get a minotaur, troll and ogre (i think)
Lizards can get a krox
Chaos can get a minotaur
there are probably others but thats all i can think of
If you want a hand with anything http://bbtactics.com/ is great
Skaven can have a rat ogre
Humans get an ogre
Goblins can have 2 trolls
Wood elves get the treeman
chaos pact can get a minotaur, troll and ogre (i think)
Lizards can get a krox
Chaos can get a minotaur
there are probably others but thats all i can think of
If you want a hand with anything http://bbtactics.com/ is great
Simian aka Ben
Interests
40k Death Guard, Nurgle and Space Wolves, Malifaux (Guild, Gremlins & Ressers), In Her Majesties Name (Professor Berengei's Circus), Bolt Action (Big Red One), Dredd (Robots), OGaM, Necromunda (Redemptionists)
Hooting into the Abyss
Interests
40k Death Guard, Nurgle and Space Wolves, Malifaux (Guild, Gremlins & Ressers), In Her Majesties Name (Professor Berengei's Circus), Bolt Action (Big Red One), Dredd (Robots), OGaM, Necromunda (Redemptionists)
Hooting into the Abyss