The ribbon tweeter in the Proac K-series is beautifully smooth. The speaker is also an impressive all-rounder. Works with rock well too. I home demoed the K-6 and was very very tempted.
The Avalon Ideal is also a wonderful speaker, rich and non-fatiguing. I home demoed this and I very nearly kept it.
I suffer from hyperacusis, which is a sensitivity to loud noises at certain frequencies, and for me it is triggered my harsh trebles so I am fully understanding of your issue with the Focal - I find Focal’s trigger my hyperacusis whenever I hear them at shows.
Having heard many of the ones recommended I would add that the Sonas Faber I home demoed (top of the range Guaneri tradition) whilst the best I have heard for classical and jazz, was not so good with rock, too smooth. Similarly Harbeth and Spendor are great speakers but like many British speakers, strong detail and a sense of driving rhythm is not one of their most potent characteristics, and if this is important to you then you may be disappointed.
I ended up with a Boenicke speaker which is an extraordinary speaker but may not be so widely available in the US.