Danny Green, Shane Battier, Robert Horry, Convington and Avery Bradley are some of my favorites playing this role. I know OG, Derrick White are put in this category but personally I think they do a lot more than just 3&d. The question is are the number of players who specifically play only 3&d becoming less significant in current version of the game?
The elite 3d players have always had more to them, despite their primary focus/strength being obviously 3&D.
Eric Gordon for example on Houston was obviously there to chuck deep 3’s and play defense, but he was more than capable of putting the ball on the floor and slash to the rim on occasion. Basically, any time Harden was out for a game, Gordon flashed for like 30+ points show casing his complete offensive skillset instead of simply playing a cog in the Harden wheel.