Question about Marvel Cosmic Beings

First I hope I posted this in the right section. I'm sort of new to all this in depth knowledge about comics, and was wondering about just how universal cosmic entities such as Galactus, Dormammu, the Phoenix Force, Eternity, Death, etc.. are, mainly that with there being an infinite multiverse, parallel realities and futures, is there an infinite or even multiple numbers of these beings from different universes and futures, or are they all truly unique and one of a kind? I'm sorry if this is something that might be innately obvious to someone more knowledgeable on the subject.

There is a Galactus in every (almost) universe in multiverse

@karthull: With most there are multiple copies. With Eternity it gets a little more complicated as sometimes he is shown as having multiples and sometimes people argue there is just one or maybe one which represents the entire multiverse. Living Tribunal is really the only abstract that there is just one of. PF I think also just exists as one being manifesting itself in all the universes.