There are many exceptional companies these days, both large and small. Internet makes more accessible to more people. So its harder than ever to single any one out as the best.
Having been at this many years and having researched and experienced many in recent years as well, I can list the ones whose products I currently own and that are well established and I find myself still willing to go back to repeatedly.
Those are OHM , Bel Canto, Dynaudio, Audio Research, Triangle and Sennheiser. mhdt is another but a smaller lesser known more niche foreign vendor.
They are many others at all price points I have heard and think highly of and could easily recommend but do not own currently.