You have many laser and inkjet options, adding fax capacity to an all in one is not a space consumer, what really adds space is the option of having a flat bed scanner in addition to a sheet feed scanner. The other slight space hog can be an ADF.
If you can get away without an flatbed scanner, you are still left with inkjets can be made to be smaller than lasers. But ink jets are more likely to eat you out of house and home on consumables. Lots of factors to consider and it should be based on your printing needs.
In my case, I have a lot of room, and I have a large laser all in one, with flat bed scanner and ADF, but I can understand it would horrify you as a space hog.