Hmm, tough one as I don't know much about EMs.

But if I had to pick three from 1967 I would choose:

Shagri La (Williams)

Saw one sited in a knocking shop  
*Slugfest too . . .

1952
Gottlieb: Cross Roads, Happy Days, Skill Pool.
Williams: Horse Feathers,Paratrooper, Slugfest*

Lots more, but I like those titles.