Don't know any of these things, but I know Kroc le Bô (Kroc-the-Bewtifool), the misadventure and bad luck of a half-goblin/half-nymph (and thus, bewtifool), with an undestructible hit point (and thus, immortal, but that don't prevent him from being hit), and gentle and nice and all; yet still a goblin (and thus, purchased by every munchkins that charge at him screaming "There ! 5 XP ! For me !" or summoned by a wizard demonstrating to his student how the "summon monster" spell works, etc.
Also, the adventures of the Grosbill (Bigbill, or Fatbill). An archetype of a D&D munchkin: stupid, bloodthirsty, with a dozen intelligent magic swords in his sheath (that usually complain about not having enough place), and the only stomach of holding (beer only) ever. He frequently chased Kroc, when he was not traveling the planes until he could find "Mr Gugax" and cower him into adding to the DMG table an item he wasn't able to find at the market (namely, a +2 toothpick).
Or the wonderful Mongol & Gotha (Mountgol & Gotha ?), two first-level fighters that never leveled and always fought against the loathsome "Mago 27", a 27th-level wizard with a signature spell of "bananamorphosis". (3-4 cases strips in which the "heroes" nearly always got turned into bananas.)
But the better to date has been "The Quest for Answers", where a little band of adventurers are searching the explanations behind such clichés as "why do dragons hoard treasure", "why heroes never die", "why heroes never go on vacation", "why princess are always pretty" or "why are dwarves small". One of the best had been "why are heroes always human(oid)", and featured the prowess of three farm animals (mirroring each one of the "normal" heroes) trying to defeat the evil of the nearby inn's cook; but finishing on the dishes of said normal heroes (and one of them sayng merrily, "nothing like fresh meat when you had a day without adventure nor carnage").