I think Almost Human has a great potential-M/M pairing. The main guys are two policemen, one of them sexually repressed, and there's build-up of their friendship through the first (and sadly only) season. It's one of those canons you find yourself to watch not for the plot of the episodes that are just somewhat-futuristic procedural cases, you want watch it because of the main cast, their exploration and the advancement of their relationship from 'forced to be partners' to '(possibly best?) friends'. The main pair's dynamic and chemistry is great and while I've started watching the show just for the sci fi element I was surprised into ship them hard.