Indeed he would have. He was trying to fight the Klitschkos at age 45 iirc No shortage of guts in Holy that's for sure.
But Holy never actually beat several of those, lost his series to Bowe and also was 1-1 with Moorer. Surely resume is who you beat rather than just who you faced, otherwise George Chuvalo has one of the best resumes ever.
One fighter who can walk away from boxing in the full knowledge he owes the sport less than nothing. He gave it everything.