Roger Taylor became wealthy from that because at the time the writing royalties were spit between the writers of the A and B sides. The story goes that Roger locked himself in a closet and wouldn’t come out unless the band agreed to make I’m In Love With My Car the B side of Bohemian Rhapsody.
Taylor was and still is quite a singer. He could have been lead singer for 95% of bands in my opinion.
People focus on Freddie, but every single one of those guys are incredibly talented. The proof of that has been their tours and appearances since freddies death using one famous singer or other as a “guest” frontman. Some of those have been released as “charity” singles (proceeds to one group or another) or concert videos, and have sold very well.
CC