Other than that one peak in the 40+ range, yout graphs look pretty good. Question, are your speakers rear ported? My KEF’s have 2 rear ports and a couple of different “Tuned” inserts to change the bass characteristics. Back in history, I used small sponges and placed them at different spots in the ports to adjust the bass.
Either way, a MiniDSP should help a lot.
All the best.