This has been my go to list that I will pick and choose from. Any are good, although some have their own annoying quirks:

Trapped Soul - The Ascent of Arceuus

Count Draynor - Vampyre Slayer

Sand Snake - The Depths of Despair

King Roald - What Lies Below

The Kendal - Mountain Daughter

Me - Lunar Diplomacy

Skeleton Hellhound - In Search of the Myreque

Tree spirit - Lost City

Dad - Troll Stronghold (Frequent knockback attack that can be annoying)

Khazard warlord - Tree Gnome Village

Black Knight Titan - Holy Grail

Ice Troll King - The Fremennik Isles (attacks only with Melee in hard rumble)

Bouncer - Fight Arena

Black demon - The Grand Tree

Jungle Demon - Monkey Madness I (attacks only with Melee in hard rumble)