What's a band with a bassist as the lead singer?

It seems like most singers in a band either solely sing or if the do play instruments, then it's either a guitar or piano. I don't know of any bands where the lead singer also plays bass while performing. The only example I know is from the band Muse, where the bassist sang songs he wrote. But thats only for the few songs, he's not the main singer. Anyone know more examples?