Vin Scully is #1 hands down, end of discussion.
For #2, I'd make a case for Bob Costas.
The old 1980's NBC Game Of The Week teams of Scully with Joe Garagiola and Costas with Tony Kubek were top notch.
As a Minnesota fan growing up in the 70's/80s....Herb Carneal was great to listen to.
Hawk Harrelson, Ron Darling, Jerry Remy, Michael Kay, John Sterling and Harry Carray make/made my stomach turn to have to listen to them.