I don’t use the pref curves. But as Resolve mentioned, the 5128 generally measures brighter than 711-based rigs. To answer the other part of your question, there are some headphones that do not measure as brightly in the mid-treble on the 5128, and also on the 711 rigs as well.
I am not necessarily recommending them, but Audeze headphones tend not to measure as bright in the mid-treble. This includes their recent releases, like the MM-100 and MM-500. The Neumann NDH-30 is another example.
The Grell OAE1 and HEDDphone 2 are also quite recessed in the mid-treble. So there are obviously some very respected audio developers who think there’s some sort of advantage in this kind of tuning.
These are some recent examples that come to mind.
Philips also experimented with dips in the treble on some of their headphone designs. But that’s goin back a few years.