How 'bout some basic ones.
Armor of Faith- great lvl 1 spell- gets better as you progress
Silence 15' Rad.- I used to never use this spell. Don't know why. Early in the game, it's great against enemy mages and clerice, especially groups of 'em. I often have 2 clerics hurl that into the enemy as my fighters rush 'em. It would make for a strange combat scene in reality.
Melf's Minute Meteors- great RoF, good dam, hurts just about everything.
Holy Smite- good, low-level area effect spell that won't damage your party. Gets better as you do.
Spell Triggers and Contingencies- especially for Cleric/Mages. Just plain cool. Adds new wrinkle to spellcasting strategy.
Just a few that come to mind.
Matti Il-Amin, Paladin, comedian, and expert adventurer. Proudly bearing the colors of the [url="http://www.svelmoe.dk/blade/index.htm"]Blades of the Banshee[/url]