Basically, I want to base my larger Monsters (such as Ogres, Minotaurs, Trolls etc..) onto 40mm bases, but I think it looks silly having them only taking up one tile square on the board per the rules.

Therefore I was wondering, if I were to have then take up a 2 by 2 section of board each (therefore blocking corridors and the like, more room for people to be in base contact) would it affect the game too much? Does anyone else do anything similar to this?