AFAIK most historians/scholars agree that Jesus was a real person (even if a lot of the Bible's claims about what he did are not true). But I'm not a historian. What are you basing your opinion on?

There exists documented proof in many bits of literature from around 200 BCE to around 100 CE of numerous different figures in what is called 'Jewish Apocalypticism', basically a small in number but persistent phenomenon of Jews in and around what was for most of that time the Roman province of Palestine, preaching that the end would come, that God or a Messiah would return or arise and basically liberate the region and install a Godly Kingdom, usually after or as part of other fantastical events.

Jesus was one of many of these Jewish Apocalypticists. Much like the rest of the movement's key figures, they were wrong, and their lives were greatly exaggerated in either their writings or writings about them or inspired by them.

This seems to be the (extremely condensed) opinion of most Biblical Scholars.

There are a very small number of modern Biblical Scholars that are 'Mythicists' of some kind, who believe that Jesus was completely fictional and wholly invented by certain people or groups.

This is an unpopular view amongst scholars and historians of that time and region, as most believe it more plausible that Jesus was just another example of a radical Jewish Apocalyptic preacher, which again, was fairly common for roughly 300 years in that region.

Its like how if you go to a big city theres always that one guy with a megaphone preaching imminent doom. 99% of people think this is silly and ignore them, but tons of people know that people like them exist and do have small followings.

I agree with you that Jesus wasn't God, who doesn't exist, and that there were no miracles, which are impossible. However, this is not the same thing as saying that there's no evidence for the existence of Jesus, the Jewish apocalyptic preacher.

The earliest documents about Jesus, such as the Pauline Epistles, were written by people who knew people who knew him. In a mostly illiterate society 2,000 years ago, this is about as good as evidence gets. It's also the exact same kind of evidence as a journalist or researcher writing an account based on interviews with people. This was how, e.g, Herodotus wrote his histories. When Herodotus says 'A guy rode a dolphin once' we dismiss that. But we don't say 'The people in the Histories didn't exist, except those for whom there's physical evidence, which is about three of them, not including the author'. We do much the same with Jesus and the miracles.

If the Apostles had wanted, for some reason, to make up a guy, that would have been risky. Other people would have just said, 'That guy didn't exist'. If they had anyway decided to make up a guy, they'd have invented someone who actually fulfilled the Jewish propehcies of the Messiah, instead of inventing Jesus, who obviously didn't. This suggests they didn't invent him, which strengthens the plausibility of the evidence we do have.

A third way of looking at this is to ask if there are any comparable figures, religious founders from the historic era, who we now think were wholly made up in the way you're suggesting. But there aren't. The Buddha, Confucius, Mohammed, Zoroaster - they all certainly existed. Indeed, I can't think of any figures form the time period who were actually imaginary.