Don't forget Different Worlds and Dragon...
Personally, I collect articles by the late Paul Montgomery Crabaugh; I could run a campaign with the Starter Traveller and his articles, and be happy.
I'll confess, I prefer Starter Traveller as my "core" CT text. Of course, you have to grab two chapters from the TTB to be complete, and then you need a copy of the First Edition of the LBBs to get the missing pieces (sigh)...
I still don't know why those weren't put back together for the reprints.