Whilst they were definitely fierce rivals I think there has mostly been mutual respect between stoner and pedrosa, certainly so hitherto in the premier class. As we discussed at the time the honda data sharing issue seemed to be sprung on them by journalists resulting in mutual perplexion, and perhaps primarily reflected a puig vs suppo conflict rather than anything between pedrosa and stoner. Both pushing for what maximally benefits each of them within the hrc team is to be expected in any case and does not necessarily imply personal animosity, and the position of each on the question of data sharing when asked off the cuff was consistent with their previous practice.
Whilst valentino obviously likes beating stoner, I am not sure he particularly dislikes him either, and in fact seems to have praised him more than any other significant rival ( given that he has ever had a significant rival, with which you may disagree
). I think you are on fairly safe ground with the other rivalries among the top 4, there is fairly definite mutual dislike between rossi and lorenzo, and pedrosa and lorenzo.