Phil Collins, easy.
He lifted other artists during his prime... all the same while he was making hits. He wrote for artists, produced their records, played drums on their albums or live; Phillip Bailey, Frida from ABBA and helping Eric Clapton's comeback in the 80's. Sting stayed focused on his own stuff, and his music was more philosophical while Phil was carving out an Era for Genesis and Himself as a Solo Artist.