Mostly every card in the main deck comes in Gold Rare. The only cards not found in main deck this rarity are Tour Guide of the Underworld, Fiendish Rhino Warrior, Ash Blossom & Joyous Spring, Fiend Griefing, Paleozoic Dinomischus, and Infinite Impermanence.
Edit: With Maximum Gold a few cards became Gold Rare. It's not the original Gold Rare but it technically fits. Tour Guide of the Underworld, Ash Blossom & Joyous Spring, Infinite Impermanence, and Borrelsword Dragon all became Maximum Gold Rare. Updated for the December 2020 banlist.