I have no experience with any of the mentioned headphones, but can give you my 2 cents.
LCD-X — remove from the list, >600g, very heavy and not really ergonomic/comfortable for long periods of time
HiFiMan Arya — I heard it’s bright, should be comfortable, from what I’ve heard you either love it or hate it
HD800 series — imo, you can’t really go wrong with Sennheiser, and comfort is top-notch
Focal Clear MG — just like Sennheiser, I don’t think you can really go wrong with the Clear MG, Focal knows what it’s doing and you should be getting quality (though I heard some people say it’s pretty much 50/50 in terms of quality control)
Beyerdynamic T1.3 — now Beyers are truly a very tricky choice if you never had the opportunity to listen to them beforehand. From what I hear there is also some controversy behind the T1.3 model
Every headphone youve got on that list is polarizing, except the Focale unless you’re willing to EQ the LCD though as mentioned, too heavy. The Clear gets rave reviews unless sound stage is important to you. If you’re willing to spend that much you could consider ZMF, or Dan Clark for ultimate comfort
Personally, Sennheiser has always been at the top of my list when it comes to comfort. Own the HD598 for several years now, still the coziest and most comfortable headphone I own. There’s something about velour pads, but not a whole lot of headphones are stock tuned and manufactured with velour pads.
I have no experience with any of the others, just getting into headphones myself. However, I spend most days (6 or more on average, but the average doesn’t add up to the full 7) wearing my Focal Elegia for 10+ hours.
For my head, they are quite comfortable for sustained wearing. That being said, it could well be that someone with a different shape/ size head, larger ears, or not shaven as I am (completely shaved, head and 'stache/ beard) might not find Focal as comfortable as I do.
For me, after the first hour or so each day, I can easily forget I am wearing anything at all. They just disappear on me. As with many worn accessories though, one size fits most, and YMMV.