best weapon and monster mods?

I know there are lots of wads that add new custom monsters and weapons, but which are the best ones?

It would also be nice if you are allowed to use them yourself in your own custom WADS.

I don't know if you'll like these, but I found them to be good mods:

Herculine's Doom Upgrade | Herculine | GZDoom

Scalliano's 667 Shuffle | Scalliano | Vanilla and Boom-compatible ports

Polaris - The Gift | Richard Smith Long | GZDoom

Brutal Doom | Sergeant_Mark_IV | Skulltag and GZDoom