You'd probably like Pandastar! www.pandastar.bandcamp.com
Most of his stuff is entirely 1x or 2x LSDJ, though there's a few tracks (i.e. Battle of the Angles, Paperplanes) that aren't entirely chip
I'd also recommend old Shirobon, and Henry Homesweet (not sure if his stuff is "purist" or even entirely chiptune however)
Kkrusty, Aquellex, and Kommisar are also great, though not quite the same style,
(bonus reccomendation: E.G.R./Abandoned on Fire, and Hypnogram. Both artists really push the sound design capabilities, though their musicla styles may not appeal to you)