I don't think it's fair to include the Massdrop headphones...... but I am going to do it anyway.
I currently have the HE 4xx, AKG 7xx, HD598, Sony MDR1A, Bose QC35 running off the iFi Nano BE > Arcam rhead (fantastic amp btw)
The HE4xx wins it for me. Soundstage isn't the biggest, but its my favourite: intimate soundstage, but not too tight to feel claustrophobic, but not too wide to feel as though you are in a concert hall. More like a bar. Bass is tight and responsive, with enough oomph, highs are smooth, mids are clear. Everything just sounds right and nice.
AKGs second. In my opinion, not as fun a sound as the Hifimans, but I use it more for gaming anyways.
MDR1As third. Surprisingly, great sounding set of closed cans which looks good for going out. Plus, I got it on sale from Amazon.
Kinda dislike the HD598s. It shares the characteristics of the AKGs but simply doesnt draw me in enough to warrant long listening sessions. It's just too boring.
Bose cant be compared cos they are simply for travelling.
But, I do have the HD6xxs coming so not sure how those are going to change things up
Thinking of the Fidelio X2s as well.