He was a singer. He had some albums out. I listened years ago and wasn't a fan, but he may have improved. Mostly, he was Mr. Spock for generations of television and movie viewers.

http://www.nytimes.com/2015/02/28/arts/television/for-leonard-nimoy-spocks-hold-made-reaching-escape-velocity-futile.html

For Leonard Nimoy, Spock's Hold Made Reaching Escape Velocity Futile

The title of Leonard Nimoy's autobiography was "I Am Not Spock," and that so offended some fans that he followed it with a second, "I Am Spock."

The actor who won a permanent place on the altar of pop culture for his portrayal of Mr. Spock on "Star Trek," was almost as famous for wanting to be remembered for other things.

And that is, of course, highly illogical.

It's hard to think of another star who was so closely and affectionately identified with a single role. Even George Reeves, the first television Superman, was also one of the Tarleton twins in "Gone With the Wind."

It's even harder to think of a television character that so fully embodied and defined a personality type. Just as Scrooge became synonymous with miser, and Peter Pan became a syndrome, Spock was dispassion personified.

Crime fiction and the movies offered Sherlock Holmes as the ultimate aloof, brainy hero. But until "Star Trek," television didn't really have anyone that distinctively — and irresistibly — coldblooded, cerebral and punctilious. (Mr. Peabody of the Rocky and Bullwinkle cartoon show came close, but he was a beagle and quite affectionate in his fusty way.) . . .

See the rest at the link.