I'm inclined to agree with you (Montana) and love your numbers here. But I wanted to add Bradshaw and Starr (I took a quick look at Unitas but he's not in league with these two).
Starr: 5 NFL Championships (2 SBs) Postseason 9-1. 15 TD 3 INT Rate: 104.3
Bradshaw: 4-0 Superbowl. Postseason 14-5. 30 TDs 26 INT. Rate: 83.0
Bradshaw's got the record and the rings but threw way too many picks, even for that time period.
Bart Starr's gotta be in this discussion.