PaulH
I have 3 thoughts as you have already bought 3 'phones and need to decide which you feel is the best for yourself.
One thought is to keep all three and use them for reference. Just as listening to the music through different speakers ie in the car, the hi-fi etc. Also get some "in ear" buds as well

the next is to listen to The Virtual Haircut with the 'phones on and your eyes closed and then decide which headphone is "more realistic"

The 3rd is to listen to a reference track that is closest to the style of music and sound you wish to have in your songs. Listen through the 3 headphones and decide yourself which sounds the best.

I have some really old Beyer dynamic DT100's if that is what they were called 20 years ago. Everything is a bit worn but are the best closed 'phones I have had apart from some "Ministry of Sounds" I got given a while back. No leakage with either when doing vocals.

Alyn