Does it need to be closed-back? If not.....
I would throw in any AKG K141 as an idea - they're very mid-focused but fun for music listening too.
The vintage silver ones are usually uncomfortable due to the pads aging, but have a VERY liquid midrange.
The vintage gold ones usually have their ear pads still intact, and have a slightly bigger bass punch than the silvers, so might be better all-rounders. Also the black and gold look will make everyone think you're a mafia boss.
Even the modern AKG K142 isn't bad either.
Any old AKG k240 (apart from the original sextett which is tuned more for sound/music enjoyment than monitoring) is also a good choice for semi-open, and gives a very good combination of value for money, superior comfort, and sound.
If you're lucky enough to find a vintage DT990 (600 ohm with plastic double-headband) for around $150, that's also a really good one to go for.
By now, the original earpads are quite flat and you get a very nice full range of sound.
Don't get one with brand new modern ear pads, as the sound completely changes to V-shaped (bass and treble emphasis and veiled mid-range) which isn't bad, as it still sounds fun, but it's most likely the opposite of what you want.