Hawke versus Grey Warden
This is new to me. Let us see how it works out.
Because Hawke is so much more powerful than Grey Warden, I will arrange the battle so that Hawke is a Mage (Blood, Elemental, Primal) in this battle and the Grey Warden is Warrior (Templar, Spirit Warrior, Berserker)
The setting is the Kirkwall Chantry, where Hawke is currently seeking spiritual aid. The motivation is Hawke has been a complete witch and the Grey Warden just happened to be in the area, talked into aiding Kirkwall despite other obligations. Hawke has a "kill on sight" principle towards templars and the Grey Warden screams of his templar nature.
Standard equipment. The Grey Warden has a templar armor and Hawke has the mage Champion outfit. The weapon of the Grey Warden is what you think would work best against Hawke. Shield and sword, or zweihänder.