There are a few contradicting words in your post. You mention gen 1 cards, but almost all the variations you’ve mentioned (e.g. Shadowless; 4th UK print; and the 1st edition stamp variations) only apply to the English Base Set. You also mention ‘official numbers’, but the thick vs thin stamps; grey stamps; and back stamps are all misprints, and misprints aren’t ‘official’ releases. Only the 1st edition; Shadowless; unlimited ©1999; and unlimited ©1999-2000 are the four officially released English Base Set variations.
But apart from that, do you want to know all different versions in general of the sets, or are you wondering about all variations for a particular Pokémon?
For all 1st edition stamp variations (including the errors), I can refer to this 1st edition stamps article.
If you’re looking for all cards of a certain Pokémon, I might have already made a list for it here, and if not I can make one for you if you’d want. 
For almost all WotC era misprints I can refer to this article.
Greetz,
Quuador