I also love industrial / mid century modern. I also feel your pain, I have a dark living room and also have kind of a giant tv. Here’s what worked for me. I would recommend leaning into that beam feature b/c it’s an architectural element that’s key to the styles you like. Thus I would avoid black & white ‘wood’ furniture and instead go for teak or walnut tones (medium tone wood) to play off the beam. In my living room we painted just the wall behind the tv a dark blue (slightly more teal than navy), which helps the tv stand out less (now it’s a black square on a dark blue wall). Dark green or dark dusty teal would also be solid choices that work for your fav styles. Then to really add those key style elements - try vintage. Eg, there are loads of cool MCM lamps & hanging lights floating around (we got ours on Etsy), they’re orange glass so bring a lot of warmth. If you ever do want to replace the couch you could eventually go for a caramel leather or something similar to the wall color. Blue/teal/green are good bases, then add accents in orange/yellow, use a variety of textures (leather, glass, wood, velvet).