According to a book I have on my lap, the Jews (during Jesus' earthly life) taught that the righteous would rise again into eternal life (Psalms of Solomon 3:16) into the 'garden of life' (1 Enoch 61:12).
Not sure if that is relevant to this thread, but it shows that the idea of an earthly hope was there. Unless the garden of life refered to a spiritual paradise.
I believe 'The Plain Truth Magazine' used to teach an earthly resurrection as well - a magazine I used to read about 20 years ago. I think that was a magazine produced by Herbert W Armstrong as well.
To be honest though, the JWs were the first organization I came across who really "stressed & laboured" this point and claimed unique ownership over the teaching.
Most 1st century Christians appear to have believed a change in state of being; death was the gateway to Christ. Through death came resurrection and a joining with the body of Christ in a spirit body. The hope appeared to be heavenly. Please correct me if I am wrong.