If we are talking about All time 1A top teams (that can be a bit misleading), I would put the 86 and 87 Murphy team against any team Robbinsville or any other 1A team has ever fielded. They were Men amongst boys those 2 years and had one of the best athletes this state has ever produced in Carl Pickens.
As far as the best 1A program, it is hard to argue with the titles Robbinsville has accumulated although I will argue that Robbinsville did win several of those titles when Murphy moved to 2A. Also, Murphy leads the All-time series with Robbinsville 46-26. Since 2016, the series is pretty even with Murphy holding a 6-5 advantage (including playoffs).
So yes, Robbinsville does have more titles but with Murphy having a very comfortable lead in the All-time series, its really hard to say which is the best program.