While the above 10 are the objective "top" via view counts on adult mod forums, there are three hidden animations that deserve honorable mentions:
These are the core animations you'll see while playing. All weapons have unique "active" and "idle" sequences. all hdoom animations top
If you want every animation in order, HDoom v2.1+ includes: While the above 10 are the objective "top"
Note: Some monsters have “defeat” (player loses) animations vs. “reward” (player wins) animations. These are the core animations you'll see while playing
When you die, the camera shows a unique sequence depending on the killer.
While many mods struggle with large hitboxes, HDoom’s Mancubus replacement features a "cooking" animation.