However you must admit that if a field has gone astray one would hardly expect people from within the field to stand up and criticize it.
Actually, that's exactly what you would expect - people inside the field are exactly the ones who can poke holes in the theory and become famous for it. Scientists don't become famous for going along with the consensus; they become famous for overturning it.
Consider plate tectonics, for instance - it was not widely accepted until the 1950s, simply because earth scientists didn't think it was possible. Who led the revolution? Other earth scientists.
This is a theme you find in pretty much every field of science. Phlogiston? Overturned by early chemists. Luminiferous aether? Overturned by physicists. The plum pudding model of the atom? Overturned by nuclear physicists. All the people who "stood up and criticized" their fields when they'd gone astray are famous to this day; but there have always been people who will stand up and criticize a field even when it's doing fine.
I mean, what do you think would happen if you found real, solid evidence that global warming is not happening? You'd get a Nobel prize out of that at least (in a few decades, after your findings pan out), and if the amount of money and media support that's being poured into the anti-climate-change side of things is any indication, a ton of sinecures would open up almost immediately. You'd be famous, simply because if the evidence undeniable, it will eventually be accepted.