I think you saw the other post already, but for reference:
The DT 770 and DT 880 both have good imaging and some boosted treble in the 4k Hz to 10k Hz range where footsteps usually exist in games.
Differences for the Beyerdynamics is that the DT 770 has more bass (V-shaped) which may distract depending on sound cues presented all at once.
One consideration for a closed back may be the Audio-Technica ATH-M50x. It is more of a 10k Hz spike than a treble bump so it may fall outside of the footstep sound range and the bass has a presence boost to some degree according to the graphs.
Imaging on all of these are good and the soundstage is smaller.
One consideration may be IEMs for even sharper imaging and more immediate soundstage. For competitive FPS I still personally prefer my Westone UM Pro 30 IEMs.
Also, the DT 880 are semi-open if that matters for not bothering others with noise or blocking everything else out.