Wrath.ian could be a pretty good solution if you want to stick with it, only tumblr is taken, everything else is available I believe.
Or you could just use it as ''Wrathians''. Everything except youtube is available.
Wrathist / Wrathest would be pretty amazing also, and everything you're after is available!
@(you need an account to see links)
ColossalWrath, ImmenseWrath, ForcefulWrath, MightyWrathian, TotalWrathian, Wrathfullz, EmperorWrath these are available pretty much everywhere including facebook, youtube and twitter.
TotalWrath, MightyWrath, Touchmywrath are available on some websites.