I only own a few, because if they aren't great for me, I don't keep them.
1. Sennheiser HD600. Best of the bunch, Detail and soundstage galore. Analytical yet relaxing at the same time. no fatigue, best for hours and hours of listening.
2. RHA M750- My favorite IEM, with PFE tips. Fantastic sub-bass, smooth but detailed mid-range, extended treble but never harsh. Needed he PFE tips, because I couldn't get any of the supplied tips to seal well.
3. Audeo PFE - own several pairs of these, and lots of the filters and tips. These were my only IEM for a long time. I had tried some more expensive ones (by a factor of 3 or more) but didn't come across any that sounded this good. The ability to tune the sound with the filters is a great idea. Crystal clear, great soundstage, nice bass but need a slight boost to bring out the sub-bass. Nearly indestructable.
4. AT ATH-AD900X. These were ny only full-size can for a long time. with the pad and rubber band mod getting a good seal and enough clamping force, their bass is actually very good, extends into the sub-bass and is quick and detailed. Mid-range detailed and a little cool. The X version of these phones has less treble energy than the original, I find it very balanced, with no sibilance. I don't find the soundstage on these to be as good as most people do. Its the narrowest of the phones I own.
Phones I didn't keep: AKG-K701 (I found these unlistenable, way too sibilant, poor bass, maybe I just don't have the right gear), AT M50x (good sound overall but just too uncomfortable and I couldn't see them getting enough ear time), AT ATH-AD900 (great sound overall, but too sibilant, sold to buy the X version), HD580 (sold them, stupidly, after enjoying them for years, becasue I wasn't using headphones anymore), Shure IEM's up to the SE530 (none of them I found to be very good, all lacking in some way, usually in the treble department and just a poor value). MEElec 151 and 161P - meh, they were OK, but nothing special so I moved them on.