The Underworld is a brilliantly understable fairway driver with glide for days. You can control the flight with the release angle, and hit almost any line.
Originating out of FInland, Westside is now owned by Latitude 64 and Dynamic Discs. But they still continue to pump out a full lineup of discs.
While they are mainly known for their quality high speed drivers they still have discs suitable for, well, players like us including the popular Harp putt & approach disc.