I use Sennheiser HD 280 Pro headphones for their excellent isolation. This is important to me because without it, one is forced to turn up the volume to be certain that one is hearing the cans rather than the live sound in the room--and such high levels of sound exposure over time can be quite damaging to one's hearing, so more isolation is better for the long term. I really don't think very highly of the sound quality of these 'phones, but with a few weeks of practice I became able to work with them well enough.
Prior to that I used the Sony MDR-V6 phones, which have elevated low-mid response and are thus very good for detecting any hum in a recording setup. When I was a studio engineer that was an important part of my responsibility, while all final EQ decisions were made over monitor loudspeakers. But when I went back to live recording, that same artificial impression of plentiful low end caused me to make rather thin-sounding live recordings, so I abandoned the Sonys.
Before that, for many years I used Beyer DT-48s which again are not pleasant but very truthful, and have good isolation although not nearly as good as the Sennheiser 280s.
If Koss still made their ESP-9 series of electrostatic headphones, those would get my vote for most truthful of all that I've heard. But with their weight and the need for a power amplifier and a separate interface/charger, they're rather inconvenient for live recordings, and anyway I don't think they're available any more.
--best regards