Well, any top 20. It's apples to oranges at this point. Nobody he's fought has any clear comparison to ranked fighters, so it's kind of impossible to say how either bigdash or de ridder would do against ranked opponents
Kind of like Ben askren, as I say. The questions around askren were never really answered. He lost to a flying knee which didn't tell us much, he beat Lawler in pretty controversial fashion, and he had a pretty underwhelming fight against Maia but that was definitely well past his prime, so that also didn't tell us much.
I would love to see him fight some stiffer competition. I think the jury is definitely out on him, though. Being double champ in onefc higher weight divisions does not mean much, unfortunately.
I love their offerings, ill continue to tune in to onefc cards but I have a pretty hard time getting excited about the big fish there in what is a very small pond.