And what is this actual character? Just tell me. What is the "actual" version of Batman? Or Superman?
Get a room full of Batman or Superman fans and you will never get them to agree on a version. Different people like different versions.
There are versions of Batman and Superman that kills, and there are versions that have a "strict" code against killing, no matter what.
And if we are going by the last statement, I guess all Batman movies made so far can be ignored. Because they were all interpretations of those creatives. Heck, Burton himself has said that he hasn't read any comic books. He made movies based on his understanding - and he created Batman, his version of Batman.
Likewise, Donner created his version, his vision of Superman. So, don't bother making statements such as "actual" character, because that's meaningless. You will never get fans to agree on it.
And besides, many of these versions (even the popular ones) don't resemble the original creations.
Oh, btw comic book Batman wouldn't work either - since even across the main stream line - the main continuities of DC - characters have changed.