BroeselHUD. As some others have pointed out before, it has an amazing capacity for relaying information in the peripheral vision zone, probably better than any non-centric HUD out there.
As for the poll, the reason the "Other" option is getting the majority of the votes is because of the lackluster options you've included. For example, HUDs like bastHUD and HerganHUD are just HUDAS/yahud modifications without significant distinct features or large userbases, and should have been considered variants or in the "Other" category. At the same time, you've omitted some of the more popular and distinct (albeit abandoned) HUDs released, such as KNHUD and G-Mang HUD.