None of those formats you listed are this though. There are plenty of cards that are bad in cube or pauper or commander, as people will happily expound to you at length if you go to a place where people who play those things congregate. "Good in commander?!" in response to every unplayable garbage card is a meme to make fun of idiots at MTGS more than any kind of real attempt at card evaluation.
(FWIW, Dualcaster Mage is a perfectly fine if unexciting role-player in Commander.)
That's really kind of it, since we already have Sneak Attack, there are no other serious contenders for red that are worth mythic status for any reason besides "was horrifically underprinted."