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)