Mavric
Yoda
The post did ask how many make noise right away, not just can you name one. The answer in 2019 was 1/7, or 14% made a significant impact. 28% (2/7), total got a lot of playing time with Nelson also.
Kind of tough to lump them all together. Linemen are pretty unlikely to contribute in year one regardless of if the are an early enrollee or not. Henrich probably would have at least been on the field (not sure what extent) but for injury. McCaffrey, Robinson and Nelson all saw significant time. The only one left would be Nance.