I would go with something similar to the third inspiration picture you showed. Start it just to the left of the big window and wrap it around to where the bookshelf on the left side of your desk is in the first picture. To do this, you'd need several (3 or 4) 2-drawer file cabinets and 2 bookcases to to put on top, along with whatever counter surface you choose...and I think that stock doors would work well for this. Install in a similar arrangement to the inspiration picture, but choose a color you love instead of the glossy white. I would be tempted to paint the file cabinets and bookshelves white or gray with black countertops. You could also stain/poly the counters to bring the wood feel back into the room. On the wall next to the window, I'd put some kind of bookcase, or a group of open cubes, for storage of craft supplies in bins. If you're keeping the piece with the drawers (gorgeous, btw), that would be perfect just where it is! On the wall above that bookcase, I'd put something like a coiled lassoo or western theme pictures. I'm not in love with your couch in this area, but you could definitely create a sitting area there for watching tv. If you do that, though, you'll need some kind of divider between the couch area and the desk area. If you never entertain customers there, you could use a curtain or room divider to separate the office space from the rest of the room, turning the couch with it's back to the desk. Treat the sitting area to more western decor touches than the desk area...perhaps a western coffee table. Personally, I like the chair in the corner and think that two chairs similar to that would be a better option for the sitting area of the room. That couch is really, imo, too big for the space. It will seem twice as huge once you put in a less substantial desk. If you put in the two chairs, you could create a cozy seating area and the chairs would pull double duty as seats for customers, if you entertain customers at home for any reason. I like the cow rug on the floor, and think it would be a comfy spot to sit for kids, especially if they were doing crafts on a small round table. I'll look back in later and see if any of this appeals to you.

I'd put the TV catty corner in the corner where there is only one window, and put the large sofa in the center of the room, facing the fireplace. Get a console table to put behind the sofa so that it looks finished when you walk into that area. You can put knickknacks on it, a lamp if you can figure out how to get it plugged in, etc. Then the love seat pulled out from the wall where the TV is now and centered between the end of the arm of the sofa and the FP. Or, even better, move the love seat somewhere else in the house and get two chairs (with ottomans? for one only?) and put them side by side in that area with a small table between them. So you've created an L-shaped seating area for conversation and TV watching that is its own space, so to speak. Coffee table yes. But because you've got wall-to-wall in there, I'd get a SMALL rug to put under the coffee table only, a rug that extends beyond the coffee table by 2 or 3 inches. Area rugs don't look good on wall-to-wall carpeting, esp. carpeting with some pile to it, as yours appears to have, as it gets lumpy from people walking on it.

It’s really hard to tell from the pictures, but it looks like you have the furniture out too far from one another because you are trying to put them against the wall. You want to center everything on the fireplace and shoot for no more than six feet between your seating pieces. Once you bring everything closer in, I think you will need to eliminate one of the chairs or replace them with another loveseat.

I am NOT a pro. I am a mom with a big family, so above all, listen to the pros! But here is my advice, having thought through these same circumstances (in a differently configured room). If watching TV is important (and sometimes it is! Our teens (not academic slackers, and also athletes) have played hours of fun teenage video games, with friends over, and, as well, we often watch movies together on a big screen. So, I place a significant importance on the TV. Not everyone does, and I get that. I would hang the TV on the blue/wallpapered wall. I would buy a sofa to max out the space between the front door and where the TV is now. Yes, it will go in front of that window. So what. You can put a narrow (8" wide or so) console behind it for lamps. Then I would find 2 comfortable armchairs, probably swivel chairs, to float between the front door, the fireplace, and hopefully not blocking the entrance to the dining room. When no one is watching TV, the swivel armchairs can be arranged to complement the fireplace, with perhaps a convenient accent table or card table in between, but for movie-watching, they could be (carefully-wood floors) slid over to provide more seating for the TV. That's what I would do.