Not voting! A cleric is as a cleric gets played. I mean, a cleric can back up the thief (detect traps, locate object), a cleric can fend off undead (turn undead) a cleric can wring some pain outa the bad guys just like the magic-user (spiritual hammer, flame strike, cause blindness, command, light, continual light), cleric's gonna save your thief's bacon with a neutralize poison, he's going to save everybody's bacon with bless and chant and prayer and protection from evil 10' radius. He's purifying food and drink and when he doesn't have any to doctor up he can create water and create food & water.
The cleric is backing up your fighters, wearing plate-mail while doing it, and using every weapon that doesn't have an edge on it, and those are things that the aforementioned magic user and thieves can't ever, ever do. He's fighting like a slightly weaker fighter at 1d8 hit dice versus 1d10. Oh, yeah, he's also saving versus various nasty things better than anyone else. A smart player who keeps all of this in mind when playing a cleric will truly win great fortune and glory.