Being able to convert Grand Masterpiece to Tet certainly had a big influence on today's purples. Moldovan and Hanson got some wonderful purples out of it. I know someone else used it too at that time - but the name escapes me ...
Did anyone have teeth before Brother Reckamp? I don't recall any that pre-date his. Techny Spider was 1987 and it had teeth.
Edited to add that the third user of Tet G. M. early on may have been Carpenter. Had a discussion with a friend, and that name seemed to ring a bell.