It’s tough for me to comment on players from the 80’s given I did not yet exist then, but Lanny and Iggy seem like the obvious 1-2 and I don’t think many people will disagree on that.
For me I give spots 3 and 4 to Kipper and Vernon. Vernon because he’s with Iggy and Lanny in the rafters and Kipper because he was the best goalie I’ve ever seen in a Flames uniform by a long shot.