Who are the most important angels in Christianity?

That is, according to The Bible. Who are the most important angels, and what are their jobs? There’s Michael, Gabriel, any others? Do they have some kind of hierarchy they go by? I need at least four angels, if there are that many. Ones mentioned in The Bible, or at least ones most Christians agree about on being important. Important as in having big roles.
I’m aware that Lucifer was an angel, but he doesn’t count because he’s fallen. I need “active” angels. Thanks. :)