Leonard Nimoy's
Ballad Of Bilbo Baggins is mesmerizing in its awfulness though admittedly some of his covers of 60's pop aren't too bad. Telly Savalas's 1972 DJM album (
This Is Telly Savalas) is easily the best but the MCA follow-ups are terrible.
Check out Nichelle Nichols (Uhura's)
Down To Earth album. Excellent stuff.