If you're looking for something big, dumb, and beefy, my idea would be to go with a Bugbear and 4 levels of Fighter and/or Barbarian.

+4 STR, +2 DEX, +2 CON, -2 CHR

60 ft Darkvision

You start with 3 levels of Monstrous Humanoid, giving you 3d8 Hit Dice, +2 to your Base Attack, some Save bonuses and skill from those levels of M. Humanoid, and 2 extra feats.

You also get +3 Natural Armor and +4 Racial to Move Silently.



All of that for a level adjustment of +1.