beautiful doors and staircase. That blue carpet would be the first thing I"d tackle! it just detracts from the overall look! what's under them, wood treads? If so, you could refinish those to match, and bring in a wool runner in the same tones as the tile.
Work w/the tile instead of against it.
what's the style you want? MCM? Japanese-ish? contermporary?
going to be difficult to anything aginst the walls w/those floor heaters. how would you fit something in front of the window?
what if you did a round foyer table w/a larger rug?
back against this wall, how about a floating wood shelf, mirror or art, some modern lights, vases
hard to see what that wall is behind the staircase. could yo upaint it? bring in a modern console
or go for an mcm console w/lots of greenery and planters. that foyer needs some tall green plants
here's your bench
Q