I would call Absolute Zero the foil for the FF, with Wraith as the heart, Tachy the smart one (though Wraith also qualifies), and Bunker the strong one apart from Legacy.
Fanatic is not just the foil to Argent and the other Prime Wardens, but to pretty much the world in general; she literally rejects your reality and substitutes her own. Oddly they don’t have a particularly smart member… Captain Cosmic is probably the brightest, pardon the pun, but it seems more fitting to call him the heart, since this helps make sense of why the team has two support heroes, one of whom is the lead. Haka may have a lot of heart, and he’s probably filled the role of the heart once in a while, but overall he’s obviously the strong one, even if not stereotypical. That leaves Tempest for the missing “smart guy” slot, but that doesn’t really fit all that well.
I have absolutely no argument on Dark Watch, they fit this trope far better than any other Sentinels team, and Fjur nailed it perfectly.
Daybreak I only know from two podcast episodes, but I didn’t think Rockstar was really leadership material. I would have pegged her for the strong one, given what her powers are, even though Aeon Girl is obviously far stronger. I would call her the Foil instead, because she has such an alien perspective as a newly minted lifeform. Muerto as the heart feels wrong, but I don’t really have an alternative in mind, other than Muse, who is kind of a heart but clearly more of a brain, and I also kind of thought she was the leader, since her involvement with the heroic world predates the others (except pre-Muerto Thiago). I honestly have nothing in mind for Headlong, since about all I know about him is that he wants a paycheck.