I think that another class of player that the Flames have historically done well with is the reclamation project. Players that have a ton of potential, but aren't reaching it on their former team for any number of reasons. To be clear, the Flames lose a lot of these players as well, but a few success stories might include players like Kristian Huselius, Jiri Hudler, Rene Bourque, and even Elias Lindholm. None of these guys are among the elite in the league, but they were all great Flames.
This doesn't always work, though—James Neal, Ales Kotalik, I'm looking at you.
Love.