In case the Innerfidelity HIFIMAN HE1000.csv measurement corresponds to your model, is valid and matches with your personal complains, I would try something simple like PEAK, 2000Hz, Q=1.7, Gain=5dB, Should look like this:
python FreqRespGraph\FreqRespGraph.py --alignmin 200 --alignmax 2000 --refcurve "AutoEq\targets\Harman over-ear 2018.csv" --title "All Hifiman 1000" --files AutoEq\measurements\*\data\over-ear\Hifiman*1000.csv --peq PEAK,2000,1.7,5
python FreqRespGraph\FreqRespGraph.py --alignmin 200 --alignmax 2000 --refcurve "AutoEq\targets\Harman over-ear 2018.csv" --title "All Hifiman 1000" --files AutoEq\measurements\*\data\over-ear\Hifiman*1000.csv --peq PEAK,2000,1.7,5