Another edit I made is this probably incredibly impractical 4-10-0 “Super Mastodon” Hush-Hush. I call it “The Humpback.”
Again, not sure how this one would work, but I imagine it would be a nightmare to clean and maintain, would accelerate like a lambo, and would burn through coal like a fat guy at a buffet. On top of all that, it’d probably also be difficult to drive because of its acceleration, novice crews snapping couplings like with the GER Decapod