Others here have suggested it, but I will reiterate that the most significant positive thing you can do for a room's modal distribution is to design it with modal distribution in mind. With good H:W:D ratios you can do more to make a room sound good than any treatment added after the fact. Way more. Trying to fight bad room dimensions is a bandaid at best and phenomenally expensive if good. Spend some time reading some acoustics books on studio control room design to understand how to control first order reflections without treatment, and how to use treatment to fine-tune, not "fix" your room. "Room correction" EQ remedies anomalies at the spot where the measurement is taken and usually makes things sound worse elsewhere.
You're in a unique position to fix your room problems at their root. It would be a shame to just put it back together the same way and add various treatments (some which may work, some which may not) that fit a visual aesthetic when good ratios, construction, and geometry look purposeful and beautiful all by themselves.
You're in a unique position to fix your room problems at their root. It would be a shame to just put it back together the same way and add various treatments (some which may work, some which may not) that fit a visual aesthetic when good ratios, construction, and geometry look purposeful and beautiful all by themselves.