In some ways, the listening position<->back wall is a more important distance than the front wall <-> speaker to create envelopment, immersion etc, which is where your 14ft is very restrictive. But, you are not alone, there are guys with million dollar rigs sitting right up against the backwall.
Try to leave at least 4 ft between you and the back wall, which leaves you barely 10 ft to work with. I suppose you could set your speaker a foot or 2 away from the front wall and play with inter-speaker distance and toe-in.
Standing waves (peaks/nulls) occur between parallel walls. Set your gik floorstanding panels directly in front, behind and to either side of you. Since you are only worried about your primary listening position, you don’t need to throw panels all over the small room for now and consume all room space, as if you are an omnipresent entity listening from every inch of the room. These panels (even the 244) are not good enough though to deal with stuff under 100ish hz or so.
For that, you will need subwoofers. Get 2 KEF KC62 microsubs (since your room’s a bit on the micro side) and place it at the 1/4, 1/4 and 3/4, 3/4 room lengthwise, widthwise positions with a crossover of 80hz or so, as a starting point. Play with the phase and the peaks/nulls under 80 or so hz should disappear (get cancelled). In other words, subs will serve as effective active room treatment devices when set up right. For stuff above that, you’ve got your panels hopefully in the right places.
If you listen to a lot of classical Indian or hindustani music... sarods, sitars, santoors, etc, i.e., these are the type of instruments that typical western speaker designers never heard or don’t quite understand the complexities of...,If that’s the case, you may want to get rid of that Wilson and get a Yamaha NS-2000A, which is a trickle down from the NS5000. It should hopefully fit in your room and also do fine with rock or whatever... If you have more money, get something from Mark Levinson (Daniel Hertz), he’s a sarod player and did some thinking along those lines hopefully, i.e., talk to him first.
Good luck.