Yes you can skip them of course, that's the easiest thing.
But indeed as you suggest, maybe it's an idea to create a new Gedcom (and leave out all Unknowns Unknowns, ones with wrong spelled names (all capitals for example), without dates and so on as well, than, if possible first add the proper dates, correct names or just try adding them manually if the Gedcom isn't that large and if there are many matches (possible duplicates), because as you will understand the system can't recognize profiles without any dates as possible duplicates and sometimes adding profiles or your info to the ones present already manually in a lot of cases just works much quicker.
A Gedcom sounds quick and easy, but because Wikitree works different (only one profile for each person that lived) importing a Gedcom is also different. For example if you have to skip the parents of children you can just as well skip the children also, or make very sure to write every individual down somewhere before import, because these children if the parents are skipped , all will be imported as separate (individual) profiles .
We call them ''floaters'', so that's why you will have to write their names down somewhere, including the names (Profile ID's) of the parents present here, to be able to find and connect them to the proper parents after the import. That's also why it's important to have sources added to the ones you'd like to import, ''floaters'' without sources or some info about the parents and because of the very often repeated names in some families are very hard to reconnect (all research has to be done over again to make sure they are connected to the correct family/parents)
So that's also why it's recommended to first start with just a small gedcom, this way you can see how it turns out and than decide if you would like to try importing more, or just add them all manually .
Now if you would like some help, just let me know , I could ask Jan our Dutch Roots Project Coordinator , he has a lot of knowledge about Gedcoms , what programs are best to use and you could send one to him to make sure it will turn out fine for you .