Pixel Empire is a website that offers some incredible things for geeks. They offer posters, canvas art, apparel, and phone cases with beautiful art for pretty much any fandom. They have a portrait-style series for the original Pokémon starters or a more retro-inspired direction that also looks amazing. I also love their limited edition Star Wars trilogy prints and the Star Wars minimalist posters. If you’re more of an anime fan, they have a piece of Saitama from One Punch Man that looks like a vintage comic book cover and an intense piece for the Legendary Super Saiyan Broly from Dragon Ball.
I actually own the Retro Element Bender Series of posters that feature amazing retro art of Team Avatar and they’re great. The posters are of good quality. I can’t speak for any of the other products, but the posters have been so great that I would give the other mediums a try as well and expect a good product.