Who are the top European UFA options for the Flyers this offseason?

In the NHL salary cap era, the “risk/reward” of attacking the unrestricted free agent pool has skewed heavily towards risk. There is, however, a specific subsection of UFA’s where this paradigm inverts: European free agents.
European UFAs account for some of the biggest value signings of the cap era. Mats Zuccarello, Artemi Panarin, Sergei Bobrovsky, Evgeny Dadonov and Andrei Kuzmenko all fit this bill.
And the reason why such European players can bring such value is clear -- they are usually in the 21 - 25 age range, with their best hockey work yet to come, but have also already excelled in leagues that are AHL-adjacent in terms of quality. Also, if under 25, the player must sign a low-cos...