That sounds just like our family room in size, shape, and corner fireplace (which was a real challenge for me to figure out and in the end I needed a decorator to do it.) Here's how our designer arranged it (and by the way, he said to have a huge area rug positioned just as you have yours): Going around the room, starting with the long wall directly to the left of the fireplace wall: Wall to left of fireplace: A pair of wingback chairs and ottomans with a round tea table between chairs. These are angled toward each other of course but they back to the wall. So, pretty much, they are ignoring the fireplace. Corner fireplace. Wall to right of fireplace: TV cabinet (or, your piano). This wall has an exit to the foyer, so the next grouping of furniture begins several feet inward from it. Long wall to right of TV cabinet wall and opening to foyer: Sofa, flanked by a large trunk on the left side and an end table on the right side, and of course a coffee table. On the left end of the sofa, at a right angle to the sofa, a small occasional chair. So sofa and occasional chair "share" the trunk as an end table. Wall to right of that (which is basically mostly opening into the kitchen but has some small wall area: Another wingback chair at a right angle to the sofa. So sofa and wingback share the end table. Right now all the furniture is either being made or recovered or in the garage, as floors were just redone and we're painting etc., but prior to that I had it arranged this way with existing/old furniture, and it really looked good. I thought I wouldn't like ignoring the fireplace by not having furniture directly centered on it, but really it does not feel like it's being ignored. Have to find the area rug now but need to cool it on the money expenditures for a bit. Hope this helps!

Offset fireplaces aren't really planned to be main focal points or centers of furniture arrangement for all of the furniture in the room. Particularly if you are going to use midcentury furniture, you can ignore the fireplace to some extent. Not completely but you don't have to center the room on it.

I often ignore corner fireplaces in my furniture layouts the fireplace can still be used but it is almost always impossible to layout furniture in angles all over the space .You do need to post a to scale floor plan with pictures of the items you want to use in the space it is really irratating to have to go hunting for all the things that are described. Art noveau and framhouse will be a bit of a trick so post pics of the DR table and the lights I think you need to get a better idea of your actual style . Also what you mean when you say farmhouse because things like those lights and gold picture frames are not in my head farmhouse. Just because it is an actual farmhouse really doesnot mean everything inside has to be farmhouse.

Suggest creating an on line room planner and test configurations. Hopefully you are buying pieces and not trying to make your things work, as the pieces you choose will make a big difference (also suggest keeping them light). Take advantage of upper right corner for desk. On the wall to its left, take advantage of vertical space or if adding a TV/needing a surface, see below. Look for narrow pieces to allow more space at foot of bed. Bed under window and probably only one nightstand. Hard to tell what might fit on the left side of room; if possible, add a smaller scaled chairs vs recliner and a pouff that can double time as a side table/be stored under chair and used as an ottoman. May have play around with best location.