Beatles are the obvious answer. Lots of songs sung by each of the lads.
Cream (Ginger Baker did “Pressed Rat and Warthog”)
Police - I know Copeland did vocals on some early songs, and I think Summers sang one song on “Synchronicity”.
I think Eagles, in their “classic” lineup, did this.
I’m sure there are plenty more but I’m not coming up with many off the top of my head.