Tanner Roark had a significantly better track record of success than Matz and about as equal if not better than Ray. Matz was damaged goods entering 2021, Ray was inconsistent with flashes of brilliance mixed in with awful 5 BB performances. Kikuchi I'm pretty sure was well regarded coming out of Japan and had decent stretches in 2020 and 2021.
The difference of Roark vs Matz entering their respective Blue Jays careers was like a 2-3 win difference.