Possible 2 classes one Character?

[Noname]

Is this Possible?

Technically, yes. You can combine different classes on a single character.
If you do this, however, you will not be able to choose a hero class at level 52, which will lock you out from using specific gear. While making a hybrid is useful in some cases (eg. pikeman with 11 athletics), it usually does not pay off to restrict yourself to tier 4 items in terms of late game.