Something else to think about is, that if ME patients are a heterogeneous group, which most experts seem to think they are, then there might be a tendency for those people with an identifiable trigger, like Lyme say, to then describe themselves as being in remission from Lyme, rather than ME per se. The question then is it possible for those without an identifiable trigger to get better, and to answer that you need to prove that they are a homogenous group, which hasn't been done yet.
If you are just asking has anyone who has seen an ME doctor gone back to work and lived a normal life for a number of years, I would say the answer was yes: my father came down with the classic mono-like ME, and he kept working through it, and after a couple of years recovered to the point where he could go walking again and drink alcohol. He had to be careful about overdoing it (PEM as we call it these days), but he lived a pretty normal life for about 30 years, until he died of a heart attack, which might have been realted the ME, but then there are lots of 68 year olds who die of heart attacks.
I know someone will suggest that he only had mild ME, but that is my point - it is a heterogeneous population, so any blanket statements about remission or cure are probably not very helpful.