After leaving the Guess Who in 1975, Burton Cummings released his debut, self titled solo album in  1976.  Although still in the Rock genre, this album is more Jazz Rock, and Pop than the music of Guess Who. An example of this would be "Stand Tall", perhaps the most played song from this album:

"My Own Way To Rock", recorded in 1977 and dedicated to Steve Miller, Bob Seger, Freddie Mercury and Brian May.  The title track got a lot of air play, but my pick from this album is his cover of the Leiber/Stoller song "Framed" originally recorded in 1954 by the Robins.
I like the bluesy edge he gives this song:

His third solo record in as many years, "Dream Of A Child" was released in 1978, and was the first album he self produced.  This release became his best selling album with hits in "Break It To Them Gently" and
"I Will Play A Rhapsody".  Normally I try to pick songs from an album that didn't necessarily get tons of airplay, but this is an exception; here is Break if to them gently, certainly the best song on this album;