I think philosophy is a good example. Philosophers are supposed to be more logical/rational than other people and have been generalists until recently (many still are). They have also failed to produce a single significant piece of work on par with anything found in science. Now, some people might disagree with that assessment, but I suspect their counterexamples would be chiefly in specialist sub-disciplines: formal logic, for example. I think to the degree that there has been "good philosophy" it's found under the model of specialists working under the kind of robust institutional framework Robin alludes to rather than individual theorists taking a global perspective (philosophy as martial arts). I can't think of any systematizers I'd credit with discovering truth. I do not think Socrates, Plato, Aristotle and Descartes discovered any substantial truths (Descartes mathematical work aside) so we probably differ there. Regardless, I think there's a good argument to be made that historically truth has come from robust institutions involving many specialists (such as science) rather than brilliant lone thinkers taking a global perspective.