What about Chiarot + the 1st pick Habs received in the Toffoli deal (2022)
for
Pelletier and the Flames 1st and 2nd picks (2023)
The only fricken way I'd want to take Chiarot and send Pelletier to the Habs is if somehow we include Kylington (Chiarot would replace Kylington in the top 4) to unlock Suzuki to be included in the deal. But a move like that would cost a metric ton of add from the Flames to make it work, so there's no real deal to be had between the two clubs.
Flames get the top 6C they need (and a defensively responsible one that would be perfect in a Sutter system), and plug the hole left by Kylington via Chiarot. Downgrade top 4, but upgrade top 6. Flames would have Valimaki as reserve D (LD or RD).
Habs get a damn good dman in Kylington who currently is playing top 4, but still has top pairing upside; Pelletier who is doing really damn good (and in his interview offered a Stanley cup guarantee) and speaks French; probably Monahan for the cap balancing requirement; other pieces for their rebuild...
But the other pieces (how many/calibre) part of the trade is likely another major part of where both clubs and fans will not be able to agree upon. This on top of the fact there's too many names floating around that likely both clubs are not interested in moving already. Plus, you've proposed a deal that is horrifically tilted towards the Habs than OP.
Therefore, I do not believe there is any remaining realistic trade to be had between the two clubs. Flames are better off looking to shore up their roster elsewhere, Habs better to try and trade Chiarot to someone other than the Flames.