The death rate due to the vaccines is not necessarily an agreed-upon number either, because parents will nearly always blame any medical procedure performed in the weeks or months preceding a child's death, even if there is no evidence the vaccine (or whatever) actually contributed to it. The reality is that babies dies every day of all kinds of things, and sometimes it just happens that they had a vaccination last week when they suddenly stop breathing in their sleep--the same is true of autism, which often manifests around the same time as infant vaccinations, despite being unrelated to them, creating a widespread post hoc ergo propter hoc fallacy in parents of autistic children.
Some of the deaths may be caused by the vaccine, but even being charitable to the unsupported claims of devastated, grieving parents it is clearly a much lower rate than in an unvaccinated population, dozens per year at the very most (and probably fewer), compared to the hundreds we could expect without the vaccine. And that doesn't even take into account the improvement in quality of life for the hundreds or thousands of other people who are spared mental retardation and other crippling side effects they would otherwise experience, compared to the (again, perhaps) dozens per year who may get such side effects from the vaccine.
And MMR covers diseases that are relatively harmless compared to some other vaccines, like TB and pertussis. The argument in favor of those vaccines is even stronger, which is not to say MMR is weakly supported.