Iowa State DC John Heacock has become my favorite along with David Reeves

1. John Heacock- (from a 247 article in 2019)
How Iowa State became CFB's leader in defensive innovation
The link does a good job of explaining his style of defense more in detail.
I’m surprised his name doesn’t get brought up more. He does a great job against the Big 12 offenses while not having the talent as the other schools.

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Iowa State’s system is somewhat hard to define, and that’s by design. Schematically, the Cyclones ran a 4-3 or a 4-2-5 when Heacock arrived with Campbell in 2016. Following a ho-hum non-conference stretch the next year, the Cyclones all but threw out their defensive playbook. Heacock’s directive was to get his best players on the field. The result: A 3-3-5 that put three defensive linemen, three linebackers and five defensive backs in the lineup.

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“I think Coach Heacock is one of the great defensive coordinators in college football,” Baylor head coach Matt Rhule told 247Sports. “That defense is designed in a way where they’re taking away the big run play as well. The robber safety is always showing as an extra defender. People are having a hard time trying to find a way to run. I think if people could run the ball against them they’d have a lot of success.

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