The column is that blue pillar in the photo. It's brick and about a foot wide. It's direcly behind and to the left of the listening position. The Genelec graph is very smoothed like you said. I'll try taking REV measurements. You can't really read the numbers on my graph unless you have the graph open in the app then it tells exactly the levels on a mouse over but the roll off starts at about 110 hz and the speakers are good down to 55 hz max. I can handle a small sub in the room paired with the Genelecs so I'll probalby do that, and the crossoveer between the subs and speakers will probalby improve that dip as well with the dsp software.
I think I need to make a couple of panels like you said and see where the problem is. I'm suspecting it is either the floor to ceiling since there isn't as much treatment between those two areas, or the right side wall. The other walls have some ability to leak out some bass, but behind the right wall is a concrete basement wall which is probably reflecting some bass back in despite the rockwool there.
Thanks for the feedback. Appreciated.