Suggested by Destroyer Kingpin is a strong guy who has even given Spiderman a good fight back in the day although in the modern era he’s usually not even close to the hero’s strength level. Beast on the other hand has actually grown stronger and quicker over the years as his mutation has evolved. At this point he should be able to quickly overwhelm Kingpin and has much more actual combat experience. It’s just hard to get around that and I see Kingpin falling rather quickly. Beast wins.