DLH. Most action and closest fight.
Alvarez and Pacquiao were snoozers.
His most dominant, that I've seen, was Mosley.
Back to the fight last night, yeah Mayweather won. Nobody should be contesting that. But did he dominate him, beat him up, and make him look stupid? No. Pacquiao was certainly uncomfortable, unable to execute his gameplan, sure.
I think if Floyd wanted to, he could have dominated last night the way he did against Mosley, after he got caught. I just think both gave respect to each other, with Pac unable to pull the trigger and execute.
For me Pacquiao, Mayweather neutralized a great fighter, I know defusing an opponent isn't entertaining to many but it is to me. Rounds 4 and 6 which were the only rounds Pacquiao did most of his work and that was more thrilling than anything those other two did.
Definitely DLH.
I just rewatched Floyd/Pac. I actually think it's a good fight. It wasn't the most exciting and stood no chance of matching the hype but I liked it. Manny just lacked the ability to get Floyd to the ropes often. Dlh had the jab, good reach and size advantage plus he can cut off the ring better. This made for a better fight. Also Floyd was even sharper back then.
DLH.
The other two were just boxing lessons. Once they realized that nothing they did would matter, both Canelo and Pacquiao just stopped boxing.
The DLH fight. Floyd moved up in weight, was fighting a naturally bigger man, a HOF at that, and it wasn't a certain thing that he would win. Along with DLH remaining game the whole fight.
It was the most exciting of the 3 choices you have given.