Evil Sovereign. Properly SS compatible, and conveniently also the best HCHT ever made.
Having said that, I had my Sovereign Singlespeed for a while before I could afford gears and whilst it was still pretty good, it (and any decent rad HT) is a bike that only really rewards getting properly stuck in, leaning on some wide handlebars and mashing the gears.
With a 32:16 ratio, you just spin out really quickly and can’t ride the thing by the scruff of its neck, which defeats the point somewhat.
I like the idea of a super simple, bombproof SS hardtail, but in practice you may well find that it’s just screaming out for a 1×10 setup to get the most out of it.
Obligatory pic of non-SS Sov…