There are Atraxa Superfriends builds, Atraxa poison decks, and Atraxa +1/+1 and -1/-1 counter builds
Clive, Ifrit's Dominant is a Double-faced card that represents the transformation to Ifrit, Warden of Inferno, and Y'shtola, Night's Blessed gives you the advantage when it comes to life total
Valduk, Keeper of the Flame Valduk, Keeper of the Flame is a mono-red, token-producing Voltron commander
I know the ones run by 3/3 Elk and Maldhound do
Her I Trust You ability lets a player look at the top two cards of a deck and take one into their hand every time she quests, generating plenty of card draw and making it easier to get a specific target
Pure lifegain with no way to convert life into wins is the weakest archetype in the format