Use whatever grease you want or prefer. Should note that NLGI 2 spec is a defined range, so greases can be thinner or thicker...Lot of fudge room.

For example, If I was doing a winter or wet weather servicing, I would go for an NLGI 1 calcium complex or aluminum complex grease...NLGI 2 Di - urea grease would be 3rd on my list...I use Mobil electrical bearing grease, forget the exact name atm, and that grease is spec'd by many bearing manufacturers in "filled for life bearings". I want a grease that won't wash out and lasts.

The popular NLGI 2 Mystik JT-6 green label (calcium complex) is used on boat trailers whose wheels often go under water (salt or fresh) to launch or recover a boat and then hit highway speeds. Such a grease is too thick for bicycle use, but you can see under severe conditions that grease is still working. For ~$3.00 a tube you can't go wrong. Finding the NLGI 1 version for bike use locally can be problematic if you don't live in a farming area.

The point is use whatever works for you. If you have the money, there are some very expensive greases out there, specialized or space/vacuum conditions, that have performance specs that out perform regular greases.