My LS calls for NLGI-2 grease as well and you’re right, there are a LOT of choices. I did a lot of reading, researching, and watched a lot of videos by people who know more about grease than I do and in the end I chose Lucas X-Tra Heavy Duty grease. Resistance to water wash out was a big point for me as part of my property is a wetland and my tractor sees a lot of use in watery and muddy terrain, and the Lucas (as advertised) resists wash out really well. So far I’ve been satisfied with its performance in the environment that I operate. It’s also easy to find and the price is good at around US $4.50/tube at Wal Mart, Amazon, and most Hardware & big box stores. It’s poly urea based (not lithium) and in my application it performs better than lithium based greases. I used a little extra on the first grease job I did on my machine in order to flush out any residual grease the factory used since I didn’t know if it was poly urea or not (poly urea can be incompatible with some other greases) but I’ve never seen any signs of incompatibility since I switched to the Lucas.
There are lots of opinions on what’s best, but for my uses and needs the Lucas X-Tra HD fills the bill. In the end I think any decent grease will do, especially if used frequently (every 8-10 hrs).