Um, he’s neither famous (afaik) nor especially “metal”, but Casey LaLonde does some fun stuff. (You can listen to each album listed along the side of the page.)
Also Ratatat. (Not exactly Rock or Metal either, but lots of fun, with some “talking” but no lyrics; also, the songs lose something online because they’re compressed. Much cooler on cd.)
And, um, Daft Punk. (Again, not exactly metal or rock. More like…techno, but not really.)
Deastro is fun (and sounds somewhat nautical!).
Sorry. I know these don’t exactly fit your criteria!