I have experimented a lot over the years with acoustic panels, mostly from GIK. I have used both ears and REW measurements to accomplish what I like. I am currently all GIK. What worked for me best is:
Side walls: Combination of 242s and Alpha 4As
Ceiling: 242s
Front wall (behind the speakers): Alpha 4A and 6A
Bass traps: Alpha 6As (my corners are scaled, with multiple outings, so I can only “tuck them in” with overlapping Alpha 6As)
Back wall (behind my listening chair, about 10’ behind): Alpha 6As
I like the Alpha series a lot. Very versatile, as they are a combination of absorber, diffuser, and bass trap: https://www.gikacoustics.com/product-category/alpha-series/