Backstory, we had mold on the inside wall of our half bath. The walls have tile 4 feet up all around. We were not able to save much tile and we cannot find tile to match so we decided to leave the wall untitled. It's the wall with the toilet and vanity. My issue is the inside corners where the old tile meets the new drywall. The tile is uneven on the tiled wall with a gap of up to 3/4 inch. Any ideas?

Thanks