If you had to put a label on it then I guess Mugen Musou would probably be considered the Draupnirs of the kendama world.
Some other really popular kendamas would be the hand made ones like Sweets Homegrown or Terra Kendamas - they just have an amazing feel and play play style that mass produced kendamas can’t match.
Other than that, any JKA kendamas (Ozora, TK16, etc) would be considered the standard because they are certified for competition.
In the end it’s all personal preference though, just like yo-yos. Some people like different shaped kens, different wood types, different finishes, different weights, even different string thickness. Just try out a couple different kendamas and see which suits you best.
You probably won’t find a decent kendama at Walgreens (at least not any i’ve seen) but I think that we have a great selection here, and if theres something you can’t find here then check out kendamaUSA or Sweets.