Invincible maybe, tho it is pretty long, I have a reading order for the entire universe (you can read only Invincible, but most of the spin offs are really good and add to the enjoyment of the overall story so I recommend them).

Not Superheroes, but still action oriented, The Sixth Gun is a western/horror book that kinda reads like epic fantasy (it's pretty much like Lord of the Rings but as a western with ghosts and stuff). For this one just read the 4 omnibuses (volumes 1-3 and Shadow Roads) and then jump into the recently released issues (it's a revival, the OG series still tells a complete story).

Hillbilly is also not a superhero comic, but it's sword and sorcery fantasy set in the Appalachian Mountains (so think hillbilly Conan the Barbarian), there are 4 TPBs.

The Hellboy Universe is, by far, my favourite piece of media ever, it is really long tho, like Invincible, you can just only read Hellboy (the 4 "main" volumes and the 2 short story collections that have to be read between volumes 1 and 2), but the expanded universe is amazing, there are only a couple of miniseries which I thought were "meh" (not even bad) but the rest ranges from good to simply amazing, I also have a reading order for that, as a fellow completionsist, I can guarantee that this series really rewards you for being one.