About to buy some so need advice on ones with less taste change and most protein for less scoops! I know y'all will know the answers to these questions! Best group EVER!!! Thank you!!

Hydrolysed Whey Protein Isolate (also known as Whey Protein Hydrolysate), tends to dissolve a little better than regular non-hydrolysed whey, so that might be something to look for? The hydrolyzed version is also a bit more bioavailable, so that's also a good reason to choose it. Unfortunately it's typically more pricey, so keep that in mind. You can also look for "Clear Whey". As far as I know, clear whey is all whey protein hydrolysate, but you should double-check before buying anything.

I don't really have any brand recommendations, but as long as it's pure 100% hydrolysed whey protein isolate, brand shouldn't matter. Plus, I don't know this for sure, but I've been told by others that most whey on the market is produced in just a few manufacturing plants and thus most of the "manufacturers" are not really making it themselves. They just contract out the work to one of these plants. My point is, I'm not sure there's a ton of difference between any of them.

One caution here. No whey is going to dissolve well into hot liquids (like coffee). Think of it sort of like what happens when milk curdles if put into something really hot. What happens to whey is somewhat similar (the proteins start to clump), so the best bet in this instance is to dissolve it first into a little bit of cool water before adding it to anything hot.

I use Isopure. That's the brand name. As SpartanMaker, it does clump if you dump it into a hot cup of anything, and it is hard to unclump. Warm water is okay, but better in room temps or cold foods if you are adding it. You can also sprinkle it on top of meat and cheese, and there is not any flavor. I got mine through Amazon, like I do most of my protein. Best of luck.