Complex sentence: The Oilers won five of those seven cups, a feat that has not been repeated since and thus arguably becoming the NHL's last dynasty, with lineups that featured legends like Grant Fuhr, Paul Coffey, and Mark Messier.
Split into simpler sentences: The Oilers won five of those seven cups, a feat that has not been repeated since. They are recognized as the NHL's last dynasty, with lineups that featured legends like Grant Fuhr, Paul Coffey, and Mark Messier.