Pryce because of how she went out compared to the grint and aresko.

Pryce chose to go down with the instillation and faces her death with dignity

Grint and aresko were executed by the inquisitor on the orders of tarkin for being complete mess ups in tarkins eyes

In terms of characters I go with Pryce. But the scene that had the most brutal impact was definitely Grint and Aresko.

I am going with Governor Pryce

Definitely Arihnda Pryce. A loyalist to the Empire right down to her death..