Resident Evil 4 - what is the hardest boss fight in your opinion?

Saddler isn't actually that hard. I agree that Salazar can be challenging but he can be beat with a rocket launcher. If I had to say, it's that one boss (forgot it's name) that you have to beat by freezing him and then breaking the ice. It's black and it's tongue moves all weird. Sorry I haven't played in a while.