That was interesting, thanks! My top umpire is Mohamed Lahyani. He's genial, calm and has a lot of panache, too. Second is Carlos Bernardes. Both have great smiles, as a bonus. Carlos Ramos is good, and the most handsome, IMO. Eva Asderaki is excellent, and broke the glass ceiling of calling big men's matches, too. And of course, the Barry White of chair umpires, Kader Nouni, just to listen to his voice. Nouni, for some reason, usually calls women's matches.
In the spirit of your video, when I was googling how to spell "Lahyani," I found this interview with him. Also informative:
http://www.tennispanorama.com/archives/16749