I've been trying to fit a paladin in as long as I've been playing 3e, and despite twelve years of playing D&D, I've never run a pure 'tank' type. So that's what I picked, but cleric (haven't played anyone with more than 1 level of cleric since my first 3e character), fighter (pretty much for the same reasons as pallys), and wizard (I usually play arcanists) will get serious looks.