(Sopwith Camel - their solitary hit pigeonholed them forever as lightweight)
Sopwith Camel were a San Francisco band that had a lot more going for it than being a lightweight pop outfit. Nevertheless, they became pigeonholed through their only hit "Hello Hello" and couldn't seem to shake it.
They lasted until the end of 1967 before calling it a day. Reforming in 1971 and issuing one album on Warners before putting it to bed for good in 1974. A second album was in the can, but only released in 2001 when interest in their work resurfaced.
They probably got further than many of their contemporaries at the time, but the end result was the same. Lack of interest, bad timing, lack of support, lack of airplay - the same old story.
At least there's Postcard From Jamaica to consider, their second released single from their first and only album for Kama-Sutra in 1967.