Giordano Bruno comes closest and is perhaps what peppertree has in mind. But have a look at his Wikipedia article https://en.wikipedia.org/wiki/Giordano_Bruno for some more nuance.
Let's assume, just for laughs, that I know a little history.
Many people have been burnt alive, Bruno included, Galileo excluded.
Bruno was a singular immolation for multiple heresy's, the Cathari were immolated en masse along with non heretics (for God to sort out) .. but none for claiming the earth traveled about the sun, Bruno (IIRC) made waves for denying actual core beliefs.
( Wikipedia cites Bruno not accepting the Trinity, the divinity of Christ, the virginity of Mary, transubstantiation, et al as the main items on the docket .. more than enough for the church of the time )
Galileo wasn't burnt at the stake and many would hold that despite popular opinion his trial had less (almost nothing) to do with his support of heliocentrism nor even his "mocking" of an old friend and now Pope as "Simplicio" and was instead rooted in the worst kind of corporate infighting - he had savagely insulted people that ascended to power within the church who seized their chance for revenge when it came.
You can always find a hook to hang people upon if you look hard enough, the actual reasons for wanting them hung are often orthogonal to any claimed in performative public trials.
I don't agree with your implied 1:1 isomorphism between "traditional societies" and "illiterate peasants".
Many would argue that the "highly educated, clerical class" of those times represented a rigidly traditional society that punished any who deviated slightly from their norms.
Orwell, in particular, via his character Goldstein, called out the highly educated, clerical class as the most likely to define deviation and punish deviants.
moderately educated, owning class: these can afford (at least some privacy for) their deviations, but in order to administer the economies which support their lifestyle, have need of the
highly educated, clerical class: these (having been deputised some power) must conform, lest they be rusticated into the
poorly educated, working class: these again get to deviate (because who cares); they've never ever been, and they're never ever going to be, any danger to the owning class.
But of course this tripartite division only holds true in Oceania (and Eastasia, and Eurasia); it clearly wouldn't in any actual earthly polities, right?
The original point was about the evils of traditional religious societies and brain washing. Religion is a convenient way to kill people, and a way to brain wash the masses. Of course it is both easier and harder than the meme religion is bad because of its apparent need of traditional catharsism through burning people. You seem to agree with this so what are we discussing?
I agree.
Which traditional societies burnt scientists (plural) for suggesting earth revolves around the sun?