I've added my Knave class for Labyrinth Lord Original Edition
Characters (OEC) [0], OD&D and Core Labyrinth Lord to the resources
page [1], in PDF and ODT source formats. Just look in the section
for the game in question to see the selectors.

The Knave class is a Thief variant with some differing skills. I
created all of these some time ago, and the class has seen use on
and off in my games, so I thought I'd publish it. The main
difference between the OEC and the OD&D versions is the use of 2d6
for skill checks in OEC, to allow the advancement of up to
level 20. So the OEC version certainly could be used in an OD&D game
if you wanted access to higher level play, or just preferred that
mechanic.

[0]: gopher://gopher.smolderingwizard.com/0/phlog/2020-09-01-a-quick-look-at-labyrinth-lord-original-edition-characters.md
[1]: gopher://gopher.smolderingwizard.com/1/rpg/player_and_gm_resources