I’m a little confused here - am I looking for singers in groups, or groups? Think I’ll just go with my own instincts here:
Lead singers of groups
Johnny Maestro (Crests and Brooklyn Bridge)
Eugene Pitt (Jive Five)
Tony Williams (Platters)
Levi Stubbs (Four Tops)
Jimmy Beaumont (Skyliners) (also loved Janet Vogel)
Ruby Nash (Ruby & the Romantics)
Aaron Neville (that’s technical, because he covered lead vocals for the Neville Brothers, but I love them as a whole, and him as a great singer.
Glaser Brothers - best harmony group ever. Jim the best singer of the group.
The Browns - love all their beautiful harmony songs.
Chuck Carbo - solo and as lead singer of the Spiders
The Browns ~ The Old Lamplighter
https://www.youtube.com/watch?v=2tuO-auG5uk
The Browns ~ Three Bells
https://www.youtube.com/watch?v=HTkbj56bnYs