I would suggest buying one of expensive brands of ramen noodles and making ramen by yourself.
Oh, dear. I'm not sure if I'm up for that, since my broth skills are parlous. Harukiya had a shopfront at the museum, but we didn't try it, so perhaps we should give it a chance, since we don't mind "oily" so much.
I just wanted to clarify that when my partner advised against "places that serve a variety of different styles of ramen" he didn't mean somewhere like the Yokohama Ramen Museum. Each restaurant there concentrates on their own speciality.
Oh no, I got what you meant. And I did really enjoy that Sapporo miso ramen.