Currently my top 2 tanks are:

Aphraates (663 ilvl) - Protection Paladin (Armory Link)
Fookiyeu (658 ilvl) - Brewmaster Monk (Armory Link)

The guild I'm in on Aggramar has 2 regularly raiding tanks thus I have no shot at tanking thus I'm left to deal/suffer through LFR which is a crapshoot in itself. My home and work schedule don't allow me to stay on late (10:00pm CST is usually my wind-down start time to get ready for bed) and I can't really spend multiple days of the week raiding thus I'm a casual through and through. Bnet tag is GhostDragon#17366 and my online window is anywhere between 5pm and 10pm CST during the week (possibly later on weekends but those are hit and miss).