I think de la hoya and sweet pea are good examples of using angles to manouveure an opponent and then hit them without them even seeing it coming.
Ezzard Charles and Charley Burley. You should see how concise and perfect their boxing is, exposing nothing with their guards and leads and they feint and draw perfectly, exploiting any holes they see. Especially Burley.
Mosley used tons of angles in his lightweight and early welterweight days. [ame]http://www.youtube.com/watch?v=uX_4I7VerPE[/ame]
Roy Jones, when you dont set your punches up, you gotta be a smart fighter to throw power punches and not get nailed in return, which is why Jones was so good at using the angles.
Of all time I gotta say Pernell Whitaker. Throwing and ducking shots from all these body twisting angles just goes to shoes how much balance this man had. Today I pick Manny. People are so drawn to his speed and power they don't pay attention to what he's actually doing because he's so damn fast. Roach taught him well and because of being able to use angles now he'll be harder to hit and protect against. This is where being a smaller fighter in a division that isn't naturally his is an advantage. He'll do better fighting small than fighting big.
Pac without a doubt in my eyes. Cotto didn't know where the **** he was getting hit from at times. Prince was always off balance, his flashiness was why he got put down so many times. Pac's usually off balance when he's throwing at angles but he never gets put down. That's quite impressive considering the shots he throws and the shot that comes back (usually a Cotto/Clottey uppercut, and those ****ing hurt).
Naz's angles were some of the oddest I've seen in the ring...he would throw leaping shots from a crouching position, which would catch most conventional guys right underneath their guard. Sometimes he would lean backwards and punch simultaneously. It was just a weird style, but he made it work with his speed, reflexes and power. That style also resulted in him having terrible balance, though, and (particularly later in his career) he telegraphed his leaping punches so people didn't find the angle that difficult to deal with any more.