When I first started researching for this slideshow I told myself that there would be no way on Earth that someone would try to do a Winston cosplay... Obviously, I was wrong.
This cosplay comes from Aerlyn's Cosplay and Designs, and was featured on Blizzard Entertainment's official BlizzCon 2015 Cosplay Feature on Facebook. Frankly, it's well deserved. Despite the impracticality of this cosplay in terms of mobility (and perceived bodily comfort) it actually manages to look realistically accurate.
Why anyone decided that cosplaying Winston was a good idea is up for debate, but they did manage to pull it off so good on them.