These people have the best things to say and are always interesting. No anchors there is another list for that(Who is the best anchor on ESPN).
http://www.ranker.com/list/best-sports-personalities-on-espn/stokified,
Buster Olney
John Kruk
Kirk Herbstreit
Mark Schlereth
Mike Ditka
Mike Golic
Ron Jaworski
Tim Cowlishaw
Tim Kurkjian
Tony Kornheiser