Here’s all of the Followers Artwork, for your visual pleasure. Some of these images are super HQ ones from the Followers press pack, while others (the in-game views) are screencaps of the followers movie. There are even three giant sized views of the character windows for each follower; those you could also see in the movie… but not this large! They’re in the interface gallery.
Here’s the Templar, who was the only Follower to score a different concept art on the presspack than we saw in the movie. I suspect the Blizzard artists couldn’t pass up the chance to draw yet another muscular dude in shiny armor with mega-shoulder pads.