How about these?

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I don't think you need the floor lamp. Since it is a guest room, a simple coat (bathrobe) rack might be nice, just make sure it is stable. Put a waffle weave robe on it.

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I would move the chair down to the foot of the bed so that someone could use it as a luggage rack or sit down on it to put on shoes.

I also might invest in a different table lamp, reachable from the bed

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Finally, are there blackout drapes on that window? If not I would get some that are easy to pull shut. I would use one very wide panel, same color as wall, attached with rings or clips on a bronze rod, Just hang it so a guest can draw the one drape over the window, right to left.

I think it's very well done. I like what you have on the walls already, but bringing in some more rust would be nice too. The natural color mytwo cents showed is a good idea too. Maybe add curtains. It looks like what is on the windows now doesn't cut much light. Some people may appreciate having morning light, but a lot of people wouldn't appreciate it, especially in the summer when the sun rises early.

If you want to use your copper, I suggest using just one.

2 night tables and lamps and a nice piece of art with some color would IMO be much nicer than metal plates hanging above my head.The other must for me in guest room is place to put my suitcase .We have a coffee maker in ours .

Something similar to the art mytwo cents posted would be nice with your bedding.

I would bring textile on windows.

Assuming it’s a Queen sized bed, if you do get a different quilt, consider a King size and put it on the bed sideways. That way it will drape to the floor on either side and cover the bed legs plus look more luxurious I general. Maybe find one that brings in the colors of your pillow. The original cream quilt can be folded at the foot of the bed like you currently have your throw blanket, and the throw blanket can be draped more casually either on the bed or the chair. . .

Too many dark elements with adding dark metal over the bed. I agree with the above, add some colorful artwork over the bed.

Your pillow arrangement could be improved to add more color and texture

One thing that is usually missing from guest rooms, apart from the things noted by remodeling1840, is a small trash bin.

Some great ideas. Thank you everyone. I could paint the apothecary next to bed to lighten it up and pick up a lighter based lamp like stone/ceramic.

You might consider adding texture, 3D artwork, or artwork that includes most of the colors in the pillow you like. You also might look at adding more pillows to coordinate with the current ones you have and perhaps wallpaper. See some ideas below:

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A fun wallpaper on just the headboard wall woukd look very good. It would offer an opportunity to bring more of the colors you like into the space.

I laughed when I saw your coverlet because I have the same one in my guest room and I remove it every time my son comes to visit. He says it’s the worst blanket ever. I replace it when he leaves. Better than him rolling it into a ball with the pile of decorative pillows (that I also remove when he comes). I’m going to show him this photo and tell him your guests aren’t as rude. Lol