I wouldn't want Ash to end up with nobody, because then Pearlshipping would be dead, if Ash dosen't end up with Dawn.
I respectfully disagree mate. If Ash ends up with no one, then every ship still has a chance. The only way Pearlshipping would die is if he ended up with someone else, like Serena, but that is not going to happen at all.
Personally I think Ash ending up not actually settling down with anyone at all is the most likely outcome. I don't know if I can see Ash ever settling down at all really, at least not any time soon. He's got the spirit of an adventurer and has a passion for helping and meeting new Pokemon and people all the time. I think that at least for the time being, the best outcome for him would just be to continue to travel until he can't anymore, and then, maybe once he's become old and wisened, open a school for young trainers to help others succeed on their own pokemon journies. I think Ash desires a life surrounded by friends and pokemon over all things.