So Glem Hughes as mentioned is phenomenal, but come on guys, is no one plucking out dUg Pinnick from Kings X - Monster bass tone and soulful monster vocals - one of the best out there. Listen to all his side projects, Supershine, Poundhound, KXM, Pinnick Gales Pidgeon.
Also the bassist formThe Atomic Bitchwax - Monster riffs whilsts singing.
I am trying to sing whilst playing, I cannot agree more with learning each part separately like the back of your hand so they go together. If you right your own stuff it’s legend as you will automatically do stuff which is in your range both playing an singing, and what comes naturally.