Heres some solo bass tracks from Troy Sanders of Mastodon

[SwamiRob]

There's plenty of clean clankyness mixed into that tone too.

[Leftybass12]

I wasn't that impressed with it. However, props to Troy for singing and playing bass at the same time.

[Arpeggiator]

on the new album he plays some really interesting stuff, mastodon are great.

[nick g.]

Troy is totally a meat-and-potatoes player, but he does some pretty cool melodic stuff throughout Crack the Skye. I think his tone and playing are all about making the band sound good, which both do.

[SwamiRob]

At least he's not just entirely following the guitars, all his slides and his slow pace of playing give the sound a pretty interesting dynamic. To be honest I'd find it much harder to sing over the way he plays then playing exactly the same notes with more picking involved.