It seems like a few get pretty close. The Dell U2417H and Benq EW2750ZL look nice, if small bezel is what you're looking for (24" and 27" respectively, but those are just examples).
I've read forums about hardcore gamers who remove the bezels on certain monitors in order to group them together for seamless FPS displays. You can probably find it by searching.
Yeah, this is my use case. I've seen a few of those setups and they're not bad. I want to max out the resolution on a single geforce 1080 (7680 x 4320) with 3 4k monitors in portrait mode.