I wasn't happy with any of the J Jonah Jameson body options for Marvel Legends. I see JJJ as sorta lanky and thin> He forgets to eat he's so busy screaming at subordinates. The Klau vest and body was a little too buff. Plus I wanted him in a more traditional Silver Age color scheme. Pretty simple recipe.

Body: DCUC John Constantine. Replaced the forearms with DCUC Deadman (I think). Sculpted the sleeve rolls.
Head: Marvel Legend pack in obviously
Cigar: toothpick painted and trimmed
Vest: Firefly 6" Hoban Washburne shirt overlay painted and trimmed