Outside culture and Jewish philosophy
If you look around at what Jews wear, eat and, pray in, it is very clear that surrounding cultures have affected us. Chassidim wear the dress of Polish noblemen. Ashkenazim eat Russian/Polish/German food. Sefaradim build shuls that look a bit like mosques, while the Ashkenazim seem to reflect churches a bit. Look at Jewish music. It is quite clear that the outside culture affected food, dress, architecture, and other aspects of Jewish life. What about philosophy? How much have non-Jewish philosophical trends and developments affected what and how Jews think about their religion? Have the non-Jewish trends affected our basic beliefs and attitudes?
the Rambam reflects classic Aristotilian philosophy.
The Rav(RYBS) reflects Kant and Hermann Cohen(obviously a Jew, but not observant and so would not count as a philosopher of Judaism)
As noted in the post below, R. Nadler notes that ascetic trends in Judaism seem to reflect the non-Jewish religious philosophy of the surrounding time and culture.
It may be possible(and I am sure someone has done it, if you have a reference, please let me know) to look at when ideas are first noted in Jewish philosophy(life after death, eternity of the soul, etc) and see how it compares with the presence of those ideas in the history of philosophy in general.
Has Jewish philosophy simply used the tools provided by general philosophy to refine and better express what we think and believe? or have our beliefs been significantly affected by what has been believed around us? It could be that different aspects of our beliefs have been muted or expressed to a greater or lessor extent either to agree with or provide more seperation from the outside philosophical milieu.