Of course, "creepy" is relative and contextual. The way we interpret the morality of the ancient Greek gods and other such beings is not necessarily the way their native cultures would have seen them. Zeus being a profligate shapeshifting rapist was not a big deal in a society where women were granted the same degree of consent as cattle.
The Norse (and especially Icelandic) sagas also demonstrate this pretty starkly, and are from a related tradition to the Arthurian legends. In those, people with magical powers very clearly tend to be portrayed as creepy weirdos--and also, for whatever reason, tend to be from the Hebrides.
