Mark Dinning. This song, one of the best "dead teenager songs"
in my opinion, has been covered by Donovan, Dickey Lee, and perhaps
others, but Dinning was the original in 1959.
Donovan didn't cover Mark Dinning's 'Teen Angel' he wrote his
own song, also called 'Teen Angel'. It was the B-side of 'Hurdy
Gurdy Man'.