The best hollowpoint?
The one that feeds reliably in your auto, chambers smoothly in your revolver, is controlable, more accurate than other brands, and costs the least for all of these things.
This may, and quite likely will be different for each gun and caliber.
I'm not going to recommend any particular brand or caliber, as whatever I choose might not be the best in your gun(s). You will have to find that out for yourself.
Brand A might have the most impressive pics of expanded bullets, but if it jams in your gun, I wouldn't count on it for my personal defense. Brand B might have nearly as good a pic, and testimonials from forensic pathologists, but if it shoots 8" groups at 30 feet from your gun, it's not a really good choice either!
If you really want to know which one is "best" start testing in your gun. Compare the results from different brands, and then, you have something valid to compare. Comparing ads, marketing hype, and performance from some one else's gun really isn't good for anything except entertainment.
I could, for example, show you a wonderfully expanded .45 cal bullet (which I fired from a 7.5" .45 Win Mag), but if you shoot that same bullet from a 3" barrel Kahr .45ACP, I doubt you will get identical results. A nice pic of an expanded bullet, by itself, is just a nice pic of an expanded bullet.
Your mileage may vary. read prospectus carefully before investing. Past performance is no guarantee of future results. Etc, etc..