Another I love, probably the first of this type I sought out, is Steve Ditko's the Creeper.
Around 1975 I got into the Creeper, after first seeing him in DETECTIVE 443 (a reprint of his first appearance in SHOWCASE 73, from 1968)
After his first appearance in SHOWCASE 73, he starred in BEWARE THE CREEPER 1-6 (by O'Neil/Ditko, 1968-1969).
And had two guest appearances, in JUSTICE LEAGUE OF AMERICA 70 (by O'Neil, Dillin/Greene, 1969) and BRAVE & THE BOLD 80 (by Bob Haney/Neal Adams/Dick Giordano, 1968)
Then in DETECTIVE 418 (O'Neil/Novick/Giordano, 1971)
Then in DETECTIVE 447 and 448 (by Wein/Chua/Giordano, 1975)
And THE JOKER 3 (O'Neil/Chua/Garcia-Lopez, 1975)
And by Ditko again in FIRST ISSUE SPECIAL 7 (1975)
After that there was a Creeper backup series in WORLD'S FINEST during the DC implosion era that I felt was very different from the previous appearances.
The best appearance since then was in JUSTICE LEAGUE 6 and 7, by Giffen-Dematteis and Maguire (1987).
Plus a few other short-lived series since then that also took the character in a way different direction.
