While i am starting to love the way Thor answers questions, ill give it to you the way us dummies look at it.
At lv 10, a ftr has 10 BAB. With 18 st would have 14 AB and wf now 15 AB. When you do power attack, you loose 3 ab. IF we assume that the world is non-magic, the wpn would be mundane (+0) to ab.
At 10th lvl a cleric would have 7 BAB +4 str (assume 18 st) +1 wf = 12 ab. At 10th lvl, when div fav is cast, you get +3 AB AND +3 Dam, so you are now at 15 AB. Wiht DP, your BAB is 10 +4 +1 +3 = 18 +3 dam. You also have GMW, which is a spell, +2 enchantment. So now the AB is 20 +5 damage. WIth magic vestment, you can add +4 AC (+2 on armor +2 on shield) +1 AC from Shield of Faith.
THEN, there are plenty of other spells that add damage, AB, resistance, immunity, etc (my personal fav is Living undead, which i call Pocket Pale Master - grants you imm to crits!).
So, when you look at it, YES the cleric is dependant on spells, but you will never loose ALL the spells in a dispel or Mords, so you are still ahead of the game. In my experience with clerics, things die rather quickly anyway, so dispel is rarely ever an issue.
Clerics take alittle more tinkering with and playing and studying (and if you are lucky, a player who is good with them to play with cuz you learn ALOT that way), but the end result is truly a terrifying melee monster.
Oh yeah, and dont forget the silly domains! People ask why would they be so powerful? Well, if you were A God's chosen defender, if you had a god in your back pocket, you'd have to be that good! Personally, im still trying to figure out how to get more skills (4 would be great) per cleric lvl and Tumble as a class skill. THere would have to be some god that would grant that!