I didn't check their roster to see if defection / injury resulted in 10 4 star guys leaving, but I counted 16 4 stars on ESPN.
Also there's this, in 2016 from this article:
Wisconsin vs. S&P+ top 10 (1-3): Avg. percentile performance: 76% | Avg. yards per play: Opp 5.6, UW 5.0 (minus-0.6) |...