If this was the 1960s and there were LOC still in funny books, old JP would be a Guy Lillian III or Irene Vartanoff and be scoring Flash art for his letters from editor Julie Schwartz.
Bless you, Klar. Being compared to a cool cat like Guy is the best compliment I've ever gotten as a fan. My brother met Guy at a science fiction convention and described him as a cool, weird guy, like a real-life nutty neighbor.
Irene Vartanoff actually does exist, despite speculation to the contrary in BRAVE AND THE BOLD lettercols. She's all over the comics I truly love in life: she did colorist work for my all-time favorite issue of the Gerber-era DEFENDERS, which has a crossover between the Defenders and the Guardians of the Galaxy (and is the first mention of Starhawk as well as Killraven in the Guardians' timeline). I squealed with delight when I saw a flashback to this story in the recent PARADISE X. She also was the colorist on varied issues of SUPER-VILLAIN TEAM-UP (another favorite).
She also was in charge of cataloguing Jack Kirby's art around the time it hit the fan, if I remember right.
It's a shame she never went pro the way fellow letterhacks Marty Pasko and Bob Rozakis eventually did, but at the same time...it's not hard to go from editor to writer (the way Mark Waid did) but I've never heard of many colorists becoming a writer or artist. The only one I can think of is Bill Mantlo (he did the coloring on the Englehart-era AVENGERS).