As mentioned above, OR’s CU team is the zone gold standard as far as I’m aware. However, cedarberry has serious contenders year after year with his 3 D1 zone teams.
His Phelan
Baylor team has 1x NC game appearance, 3x F4, and an E8 in the past 7 seasons. His Knight
Utah and Tark
Arizona teams have made several NC appearances each which I believe are all with zone (Im pretty sure most are?).
chapelhillne also just lost in the NC running zone with his Smith
Arizona team. I’m pretty sure he won B2B titles then swapped defense to zone.. made the NC running zone in his 3rd season.