Simon and Garfunkel without Garfunkel - Paul did plenty of great stuff on his own
10,000 Maniacs without Natalie - Sad
Yes without Jon Anderson, without Wakeman, without Bruford, and at times without Howe. IMHO, Alan White was the only later member that met the standard.
Genesis - Their tremendous riches and success correlating with the dumbing down of their music kills me. I became a fan shortly after Phil stepped in. Peter's work was revealed to me later as beautiful history. Phil began strong with Trick of The Tail, Wind & Wuthering and Seconds Out...all brilliant. Then...downhill from And Then There Were Three thru Duke...then OFF A CLIFF.
Meanwhile Peter's solo work continues to blossom, and thankfully his voice remains strong to this day. I can only dream of where Genesis might have evolved if Gabriel and Hackett stayed onboard.
YMMV. Cheers,
Spencer