What is the best class to AFK on raids with?

[Spyder73]

Bard - Put on mana song near the clerics and AFK all you want and literally no one will notice.

Source - plays Bard sometimes

EDIT: If you are melee and not meleeing people will notice. If you are a wizard there will be times when you need to port and TL people. Druids, Enchanters, and Shamans get tells to buff constantly, Necros need to twitch, Mages need to...well they are a good AFK class also unless your COTHing. The thing is all a Bard is really expected to do is occlusion of sound a mob sometimes and then sing regen songs. You AFKing is still technically fulfilling your role.

The reality is most people don't do a lot on raids - even the tanks get breaks when discs are down and a new tank steps in. Monk and Rogue are probably the most "active" because you need them DPSing at all times and pulling