For one of our games, the tank and healer are the "reliable" players, and the strikers are played by the flakes.
I went with a minotaur battle cleric. Not only does he deliver a lot of healing surges, but he shoves out a lot of damage with his Large Morningstar. The tank went with a dwarven fighter, and then once that one died (the DM had this thing about really big encounters and things that would keep on someone after they were down) he went with a paladin and a swordmage. I liked his fighter better, honestly, he was way tougher.
Brad