In 1985-1986, DC published a series of comics called Who's Who: the Definitive Directory of the DC Universe. Each page had bios of characters, list of powers, etc. There was also new art commissioned for the series, often by artists associated with the characters. Here's a few examples from some of my favorite artists.
Earl Norem is known to comic book fans for his many covers Marvel magazines for Deadly Hands of Kung-Fu and Tales of the Zombie. He was equally prolific producing illustrations and covers for men's sweat mags like Stag and Male. Here's a selection of those.