Spooky Tooth were great. The first album, It's All About ..., and the second one, Spooky Two, I think are the strongest. Supernatural Fairy Tales by the predecessing/previous group Art, out of which Spooky Tooth evolved late 1967, is also very good, (at times) early "heavy stuff".
The drummer, Mike Kellie, later played in fabulous The Only Ones. Very competent chap.