Over the years I've seen several vids of guys ejaculating great distance and/or large quantities of cum. Deno mentioned Johnny Davenport, who usually shot large loads a pretty good distance. Neil Thomas is another who comes to mind. (Incidentally, Neil looks remarkably like British actor Reece Dinsdale from the 1980s sitcom
Home to Roost.)
Karl Tenner is another Falcon model who is a big shooter. In the pic linked below, Karl is to the left of the guy cumming (whom I think is Spike).
http://www.alsgaypornstars.com/images/karltenner10.jpg
Here's another pic with Karl (on the far left)...and I think the one cumming is Spike (again).
http://www.friskyfans.org/catphotos/jocks/sentenced2.jpg
Somewhere I have a short sample clip of a Falcon video which includes Karl drencing another guy in a bukkake-type scene. As a general rule, Falcon has good orgy scenes with numerous guys and tons of cum. Similarly, in the Kristen Bjorn films I've seen, each guy cums at least 2 or 3 times (sometimes more) a scene, and it's almost always a large load.
Among straight porn stars, Peter North is known for shooting copious amounts of cum a good distance.