Earsonics are notorious for those 5khz cuts, but I don't think all of their stuff has them (particularly more recent models?).
I suspect if an ES iem ever ranks very high on this list it would be in the nature of a happy accident - they seem to have an eccentric/individuated approach to tunings and allow for certain irregularities which probably clashes with the stated goals of these measurements and quasi-objective evaluations.
Personally find them difficult to recommend for that reason (and pricing) in spite of enjoing the ones I've used for various reasons (SM1/2, ES2, ES5, S-EM9... I think ES2 are my favorites if not the 'best' kind of a spacious, midsy sound that's unique among my IEMs, but poor with some music)