I'd say sure - colour counts. Heck Vin Scully most games does both. Not sure if any of you have ever watched a Dodgers broadcast that sometimes get picket up by Sportsnet - but it is Vin by himself - weaving stories in with the play-by-play. The man is remarkable - turning 87 this year. He's been the Dodgers announcer back to when they still played in Brooklyn - lol.
I used to like Don Wittman and Don Chevrier who split games for CBC as play-by-play guys. I thought Leif Pettersen on CTV usually was good with colour.
Of the current set of TSN announcers I actually enjoy games most when in it is Gord Miller and Matt Dunnigan as they seem to be having fun and do a good job at capturing exciting moments.