Man main answer is srd core
Cleric
Gnome (lets face it the damage of cleric spells like harm or destruction blows any buff monky melle cleric out of the water.
+1 Size
+1 Dex
+1 Dodge
+2 to + 7 Heavy shield and 'Magic Vestment'
+8 to +13 Full Plate and 'Magic Vestment'
+2 to +5 Shield of Faith
+2 to +5
With the Plant domain for barkskin !!
With one splat book: complete warrior add the divine feat 'divine shield':
untyped chr bonus to AC for a turn attempt.
With one Race Book: Races of Stone 'Titan Fighting" if bigger than you =
+4 dodge bonus to your dodge target instead of +1 dodge.
eg: level 3
+1 size, +1 dex, +4 doge thru titan fighting, +2 shield, +8 plate, +2 shield of faith, +2 barkskin
= 30
level 9 (as above) but +4 shield with magic vestment, +10 plate with magic vestment, +3 shield of faith, +4 barkskin, +4 unnamed charisma (chr 14, Eagles Splendour +4, Divine Shield)
= 45
and neither stops your effectiveness as a healer, turner or ranged deadily controlling decimating threat (entangle, spiritual hammer, silence, blindness, defic vengance, hold person, poison, plane shift, slay living, wall of thorns)
Corny but you can add armour spikes of 'defence' if you are "using the weapon" = attacking.. could add 'defence' to to your weapon and shield spikes if you really want and 2 H weapon attack if you want to be useless but unhitable) and add the 3 plusses all to your AC.