@realdonaldtrump has huge reach on Twitter, as well as a distinctive style, so maybe there is no one who posts in a similar style (TBH I'd expect most to be parody accounts) who has achieved sufficient popularity to compete.
A couple pages down there are non-@realdonaldtrump tweets scattered here and there, always in pairs as far as I can see (https://twitter.com/majorbear70/status/1286690669826842626 & https://twitter.com/DavidWaddell5/status/1127214256636813313 https://same.energy/?q=I+heard+Bill+Clinton+might+be+joining..., and https://twitter.com/RealWayneRoot/status/1161435864506884096 & https://twitter.com/Mcphie00/status/1163080988085358592, Control-F to search), except scattered individual tweets from @RealDonaldTrFan
https://same.energy/?q=The+Coca+Cola+company+is+not+happy+wi....
https://same.energy/?q=The+Democrats+never+even+mentioned+th....
This could be used to de-anonymize people on twitter.
Edit: So I did a test for an old twitter account I don't have access to anymore. I was able to find it using my comments with few tries.