Agree that the linebackers are 100x better than last year.
I'd pick Jewell as the best, but Niemann is pretty damn awesome at his job. Unfortunately, his job usually doesn't get noticed (coverage, setting the edge). After his sack today, he now has 3.5, which is a huge number from that position in our offense.
Kirksey had 5.5 total sacks at Iowa, and I thought he was excellent at getting home. Niemann may turn out to be as good as Kirksey, which is really saying something.