Good Hosts

Who are good hosts on TV shows, in your opinion? By host, I mean for example how Steve Irwin is the host of The Crocodile Hunter, and how Adam Savage and Jamie Hyneman are the hosts of MythBusters.

In my opinion, three of them are:

Bill Nye (Bill Nye the Science Guy)
Adam Savage/Jamie Hyneman (MythBusters)

I don't watch many shows but Noel Edmunds owns all.

I like Paul O'Grady, Ive always been a huge fan of his. Funny guy and Parky (Parkinson) is a legend.

EDIT: Oh and Dara O'Briain is classic hosting "Mock the Week", Stephen Fry for "QI" and the Top Gear team :D

Regis Philbin (Who Wants to be a Millionaire)
Conan O'Brien (Late Night)

Anderson Cooper! He's awesome