He beat O'Brien who for the first half of the 20th Century was conasidred an all time great at 175 .... I'm sure he could beat a lot of... he was crafty, fit, strong and a very god puncher for his weight .
Eventually. He fought for 5 years as a light heavyweight. Picked up some decent wins over Weinig, Stift, Kid Carter, and Dan Creedon in that timeframe.
Tommy Gibbons perhaps? In general, I think he'd have a good shot vs. any LHW rated toward the bottom of the top 25 & lower.