Hi Alex, probably the best bet is something like the attached using Loft with Loft style = "loose".

You'll see something at the pole but it's just a display artifact from a low poly count there, make sure to do a higher density export to really see what the surface looks like:



Loose loft is usually the best way for these things but Network can also be workable if you add similar stations that progress towards a circle before it reaches the pole point. Basically you don't want a curve with different sized features like you have here with short corner areas, to slam directly down to a single point. It needs to sort of spread out to a circle before it comes down to a point.

- Michael