I'm quite enjoying using RestTalk Gyarados at the moment. Looking at that list, it beats; Taunt + Will-o-Wisp Talonflame (with Stealth Rock), Landorus, Mega Charizard X (without Outrage), Mega Medicham (without Stealth Rock), Mega Gyarados 50% of the time (Dragon Tail beats Taunt, Roar beats...