Dang, a lot of hate on Dragonsoul. I really liked the Deathwing fights. My vote is for ToGC. While I thought some of the fights were unique like the arena bosses, the lack of trash didn't make it feel like a raid at all. It was just a larger version of the ToC dungeon, which didn't even feel like a dungeon.
Overall, Trial of the Grand Crusader was ok but not fit to be deemed as a raid.