A half-ogre/Barbarian 1/Cleric 11 IMC can fill just about any role except offensive caster and skill monkey. Really, I don't think clerics are suited to those two roles anyway. He isn't as good as the PCs who focus on their individual schtick, though, just good enough to fill those roles if he wants to at the time.
Of course, the cleric's biggest weakness is that if someone is getting pounded, the consequences of, for example, attacking the enemy is rarely worth it. They generally have no choice but to fall back on healing.