Re: building KISS
...I own the 1978 movie KISS meets the Phantom of the park. On vhs
Read the comic series...at least 2 or three of them
If I was going to stat them out:
Gene (The DEMON): Brick to taste, he's the strong man but he also breaths fire, can fly (summons demon wings), and has an axe as a weapon (depending on how iron age you want them)
Paul (The Starchild): good at everything, swordsman, his star eye was uses for telepathic powers, probably an energy blast too. But I'd stick with mentalist
Peter/Eric SInger (Cat Man, or the Beast Man): Physical marvel, claws, senses. Somewhwere between Sabertooth and Timberwolf depending on your tastes
Ace/Tommy Thayer (Space Man, also the "Celestial"): Teleportation, Life support, Cosmic energy control, space travel, computer brain
Eric Carr (The Fox) similar to Cat man with more emphasis on stealth; one of the KISS series did a one shot of a ninja overcoming the Four and becoming the Fox; if anything that was a great tribute to Eric.
Another series that I believe was short lived, coming after "Psych Circus" went the "four color heroes" route, and had character based on KISS songs as well. I remember a female speedster (I think) named Christine XVI