The Gobmother, our beloved matron is the core of most goblin decks
Its companion restrictionall of your creatures being Cats, Elementals, Nightmares, Dinosaurs, or Beastsis actually very easy to achieve, either in tribal decks or in decks that play very few creatures (or even no creatures at all)
personally a lot of the time its for PC purchases so im not too worried about resale value, but sometimes you can get pretty lucky and ive successfully crossed plenty of not pristine CGC 10s over to PSA 10s
The most important card that holds this all together is Ancient Stirrings, which allows the deck to dig aggressively for whatever its missing
Honorable Mention #3 (#11 Overall) - Bloodthirster This six-drop 6/6 Demon with flying and trample is my 11th choice
You can also try to equip Darksteel Plate to Tifa