Some people have a very funny idea of early days! Santa Cruz Blur – really? Cotic Soda is very recent too.
Original list looks pretty spot on although as someone mentioned the Pace is missing.
Also what about Funk, Alpinestars TiMega, Marin Team Ti (mentioned above), Dave Yates Donkis Nob or if you wanted to go really early you could look for an Overburys Pioneer or maybe a Dawes Ranger, or even an English Cycles Highpath.
Oh – don’t forget the early Orange Clockwork (the really old hand built ones) or the slightly later Prestige, Aluminium O, or Aluminium Elite for some nice UK retro action.
Anything with more suspension than a Rockshox Mag1, Manitou 1, or Girvin Flexstem is not old enough in my book for a question like this.