[careersuicide]

Personally I'd recommend "Don't Break the Oath"[0] or "Melissa"[1]. But really their whole LP discography can be listened to in an afternoon. King Diamond as a solo artist has been a bit more prolific though.

0: https://www.youtube.com/watch?v=Xpk1wJ62CrQ

1: https://www.youtube.com/watch?v=J_PjBUcbzqY