Just went through a major project reading up on latest and greatest headphones and related technologies and listening to various ones I could find access to.
In the end, I found the same old stand by lines to offer best sound and value IMHO. AKG, Sennheiser, and Audio Technica mainly.
Many others were OK but nothing special.
Like home audio, having a suitable amp to drive various models is a key, but does not take much to drive most phones well compared to speakers.
Audeze were nice but pricey. Hifiman offered a unique product for good value.
Grado, Polk, PSB, B&W, V-Moda, all OK, nothing special though better Grados can compete.
Would have liked to hear newer phones by Focal but no chance so far.
Stax still sound fantastic, but very pricey these days.
Lots of different aspects of comfort and features to help distinguish phones beyond ability to merely sound very good, which most decent phones do.