Yes, R.I.P.
I never watched any of the Star Trek stuff; but I liked his hosting of the In Search Of ... series in the late 1970s-early 1980s.
The show was kind of lightweight and limited, and covered the standard subjects for that type venture - Stonehenge, Roswell, the Bermuda Triangle, the Coral Castle thing in Florida, etc. - but as the host, Nimoy played it right down the middle. He didn't come on like a Giorgio Tsoukalos/Ancient Alien-type promoter/hustler, but he did not scorn the subject matter either. There are a million In Search Of ... type shows on now, but back then Nimoy's series was the only one the a born skeptic could watch without wanting to throw something at the TV.
I know he'll be remembered mostly for his Star Trek related stuff; but not only for that.