Oh there's no doubt Pride would die to Wraith if he used flash granades on him. But a fair fight without any tricks between them I'd lean in Pride's direction, he's just a power house. Pride could also take out an army without any trouble. He's 10 times worse if he's in a tunnel, since he could fully fill it with his shadows with no means for his opponent/s to reach him.
But thinking about it the Father could easely beat Wraith. The guy incapacitated some of the most powerful alchemists all by himself without any real effort. Hohenheim and Izumi are more powerful then the elric brothers (perhaps 2nd + 3rd most powerful alchemists in series. imo Flame alchemist gets top slot for raw destruction at the least), yet they were helpless against the Father.