@groveraxle I really, really like your placement of artwork with the four pieces!! Thank you very much for your input!! Would you say that the 2 smaller black and white pieces are 8x10 frames? I'm trying to figure out what size of frames and the 2 larger canvases are, so I can make this look happen! Also, do you happen to know where the floating shelf below the tv can be purchased? Or something similar? You made my morning with your help!!!

Don't hang anything higher than the top of the window trim. A clock is pointless on the stairway wall

Take a look at greatbigcanvas.com for large artwork. Not sure of the biggest size they offer, but it would be a good, affordable place to start looking.

Wall hung items should be centered 5' above the floor or hung 5" above a piece of furniture. The furniture under them should be 25% wider than the hung item. The wall behind an item should be at least 25% wider than the item. That translates to: the picture doesn't work there. It loses all its presence when crowded like that.