Some of this I do have, but indeed some I don't so I am very grateful to you for posting this. A few years ago I was in contact with Terry Blevins, who I think is with the Colorado Historical Society, and he gave me some of the information you've listed. My sister visited Hugo a couple of years ago while in Colorado and took some great pictures of which one is a street sign that reads "3rd Ave.Barron".
Really hoping to be able to find his grave in Denver. I have a brother living in Colorado but so far he's been unable to find the grave which apparently is unmarked.
If Riverside Cemetery in Denver is where you think Barron might be resting, I’d give them a call for a check on the records. Only because I had to do this myself one time a couple of years ago, and... more