Tengen Toppa Gurren Lagann (Gainax's latest production... mecha, but 100% action!)
no...Tower of Druaga is Gainex's latest production ^_^ first episode was funny but it makes me want to play an MMO for some reason -.-...
Other than what was suggested i'll suggest:
- Gintama (funny , parody, and action ^_^...only like 54 of 90+ episodes are subbed, but at least you don't have to worry about the anime being licensed
- soul eater (great action and comedy...i wish it was a game, a Square Enix Production)
- Persona Trinity (it's an anime based off the game...but a few years after)
- Bus Gamer (only 3 episodes long but an amazing three episodes ^_^)