I'm assuming the fireplace wall has no windows although it seems odd that such a long wall would have no windows if it is an outside wall. I would build cabinets on either side of the fireplace and house the TV in one of them, and make the other one a book case. I would put the couch facing the fireplace with the club chair at an angle next to it on the TV side. Hopefully there will be another chair at some time for the other side of the couch. You could have a narrow table behind the couch with decorative items on it to lessen the impact of the couch when you walk in from one of the doorways. There should be end tables at each end of the couch and of course a coffee table in front of it. If you put the TV between the doorways the couch will back onto the fireplace which would look rather odd, especially since furniture should be grouped around the main focus of the room, which is usually the fireplace. There could be chairs with small tables or perhaps a love seat near the windows at the short ends of the room for ancillary sitting areas. It would be nice to have photos of your room to get a better idea of your layout. Good look in solving this situation.

You could put the one seater recliner on the other side of the two seater across from the three seater so it wont block the door. As from the rugs and pillows there’s no yes or no answer it depends on the pattern/color of the pillows and rug

Can you return it and get a smaller one? (I admit I think your fireplace wall is lovely and I personally wouldn't ruin it with a television. But I am a tiny minority who has lived without television for almost 30 years.) Is there another room in which to put it, or do you prefer to use this room for watching it?

I’m glad you found the trampoline suggestion funny. :) I thought it was fun. But then, when I thought about it last night after I posted it, I thought, ”Yikes... I think I’ve really been on Houzz waaaayyy too long... 😂 I agree that it really comes down to what you are most comfortable with. Your comfort is the most important thing. So if you are comfortable with the loveseat with back to window and tv in the current position, definitely - why not. You could just leave the tv where it is and not go through a whole thing of converting the closet, etc. So yes, lower it a bit, if you can. And if you wanted to fill the space below tv a bit more, one idea could be some kind of plant stand under it with one tall plant or a shelf style unit with a couple of small plants on it, etc. Another layout you could consider - if it is possible - is to float the loveseat with it’s back to the closet, leaving enough room for reclining, and put the tv in this area. This way you are facing the window and not sitting with your back to it. And you have a number of options for the tv setup in this arrangement. You could use a mobile tv stand/console with wheels, and this would give you a lot of flexibility for placement - either in that corner or you could roll it over to be more centered in front of window, etc. These wheeled consoles are very convenient, and come in all kinds of styles these days. Or you could possibly use some type of corner console there. And as another option you might be able to just use a floating shelf style console. Depends on what style console you prefer and what would work best for you there. And if you decided to use a stationary console, you could wall mount the tv in that area and use some type of angling extension arm, to give you flexibility to make viewing adjustments. All types of arms available, depending on your needs and preferences. If you didn’t want to put a door on the closet right now - as one idea, you could put a folding screen in front of closet, and it would be a backdrop to the loveseat - if you can put loveseat in front of the closet. Could also be a nice look. I don’t like to promote glass coffee tables - plus for you end tables or mobile C tables, nesting tables, etc. would work better than a coffee table with your recliners. But just wanted to show the screens with sofa in background look, and this screen above, in setup with glass table, is another nice artistic screen, so I threw it in. :) But you can use any type of screen in front of the closet. And that would still be an option for you, regardless of where you decide to place the loveseat. All types of styles available. Sky is truly the limit. :)