Wow. Okay, here goes. I know I’m going to miss a bunch. Since you said wield, I’m basically including everyone who ever held the Sword without it complaining (so Tygra in Garden of Delights doesn’t count, but Luna in Telepathy Beam does).
Jaga - The Ghost Warrior
Claudis - Shadowmaster
Snarf - Exodus
Cheetara - Key to Thundera
Panthro - Return to Thundera! Part 3
WilyKat (w/Lion-O) - The Transfer
WilyKit - Totem of Dera
Lynxo - Ravage Island
Pumyra - Mumm-Rana’s Belt
Bengali (reforging) - Mumm-Ra Lives! Part something
Charr (reforging) - Return to Thundera! Part 2
Willa - Garden of Delights
Luna - Telepathy Beam (it zaps Amok but ignores Luna)
Mumm-Ra - Hair of the Dog
I think we have a “my bad” here. I was meaning use, not just hold. Kit was successful in using the Sword to defend herself and Lion-O.
I think you nailed every one that I can think of, except Mumm-Ra. I don’t recall him using it in that episode. And he also used it while in a disguise.
Oh, okay. Just covering all bases, I guess. As for Mumm-Ra, I might have Hair of the Dog confused with Runaways. I’m thinking of a scene of Mumm-Ra in the Control Room, waving the Sword about, gleefully shouting “No more ThunderCats!” The Sword is actually firing bolts of energy as he waves it around.