Some fixed 10-band EQ values you might try...
32 Hz: +3.5
64 Hz: +2
125 Hz: +0.3
250 Hz: -0.6
500 Hz: -0.8
1 kHz: +0.4
2 kHz: +1.7
4 kHz: -0.1 (or -0.1 to -1.2, see note below)
8 kHz: -4
16 kHz: -1.3
Preamp: -3.5
The 4k setting is based on an average of the values at 3.15k, 4k, and 5k. It may need to be set a bit lower though, to compensate a little more for some of the brightness in the 5-6 kHz range. A reasonable range might be between about -0.1 to -1.2.
Also, I've cut the suggested EQ values above for 32, 64 and 125 Hz in the bass region in half, because I'm afraid the bass will distort with higher values than that. (A +3.5 correction at 32 Hz could even be a bit too much.) These were my actual computed values though in that range based on the difference curve (which assumes a +6 dB boost in the bass, similar to the 2018 Harman over-ear headphone target), in case you or anyone else are curious...
32 Hz: +6.9
64 Hz: +3.9
125 Hz: +0.6
If you prefer a little more brightness in the treble, then you can try reducing the correction at 8k slightly from -4, to about -3.5 or -3.0... Or less, if you prefer.