Need advice: How to hide an ugly corner in the hallway?

I had the exact same "dead corner" issue in my office! A tall, slender planter is definitely the way to go. I managed to find a really sleek one at https://getpotted.com/planters/tall/ They have a dedicated section for tall pots, and what I like is that many of them come with internal liners, so you don't have to fill the entire giant pot with soil (which makes it impossible to move). I went for a matte black finish in a tapered shape, and it completely changed the look of the room. It’s stayed right next to my heater all winter and hasn't faded or cracked at all. If you want something that looks expensive but is actually functional, just filter by height on their site—there are some stunning options there that look more like sculptures than flower pots.

The internal liner idea is a game changer, I was actually worried about the weight! Thanks for the link.