Does a clyde type person really exsist.

no

SpiltPersonality

If there is anyone like that it's a small handful of people, and the odds are slim they'd be allowed to go crazy using their skills against their own government. More than likely such an amazing individual would be under constant surveillance their whole life. At the first hint of trouble a sniper would take them out so realistically this could never happen.

i don't have the technological engineering skills, just social engineering, but same anger and intelligence.

i mostly will not be able to answer your reply, since marissa mayer hacked my email, no notification

Yes. In fact, I know one personally.
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After all is said and done, there's usually more said than done.

I think his motives were violent hence hard to match him to someone else. But if you just compare him for intelligence and cleverness to exploit - then the real life character played by Leonardo DiCaprio in 'Catch me if you can' can be considered for the things he done and eluding the law for a long time even though he didn't have time or money resources like Gerrard to plan.

yes there are tons of people in real life that could do what he did but most of them wont because of fear of death or being caught but if they had something very bad happen to them and just didnt give a *beep* anymore they would and could do what clyde did. Most people with clydes kind of expertise or people with money are already rich and have no problems and are already corrupt and in control of everything that is happening so doubt we would ever see stuff like this.