I have the same 1920s era closet and cant bust open the wall because it is loadbearing. Also we use the would-be busted up wall for furniture, so we make do with the one door layout as follows: We run two short garment rails on the right side for shirts and pants on special hangers. Along the bottom across the 3/4h of the width, we run a raised board as a shoe shelf with room for shoes on top and below. We also run a shelf above the upper width and across the left and right sides mostly for seasonal storage since it is harder to reach on a daily basis (this is doable if you have the ceiling height). This next part of this plan sort of defies logic so stay with me: we still run the long garment rail, however it’s mounted to the back wall so we stop it about in front of the door. We only use this to hang things on the left side towards the center. And the grand finale, on the garment rail in the very center in front of the door, I have one of those hanging shelves that wraps around the rail for folded shirts, etc… It isn’t elegant, but it has worked for two adults while we figure out a better wardrobe situation. Most likely we will retire this and only use this for deep storage in the future but hey it works for now! And yes a lot of hanging garments on the left are forgotten but I use that for longer dresses and again, seasonal stuff and keep my daily clothes closer to the center.