Toward the top of the list so far is another Gao Jia Shan, Cha Duo Tang fuzhuan from 2015. It's inexpensive and looks like it's going to be much weirder than it actually is, with tons of jinhua and distinct, flakey layers.
I almost never take tea-tasting notes, but I did for this one. I got through 9 infusions (plus rinse) before I ran out of water and didn't feel like waiting for the tetsubin to boil again.

My notes aren't interesting enough to type them all out here, but repeatedly mention things like thick, smooth body; rich, clear chestnut color; long-lasting aftertaste and scent; sometimes bubblegum-like scent; ultra-sweet seaweed-mushroom umami; and sitting-in-a-hot-tub feeling of relaxation. Also amazement that I can drink this at 8 pm and still feel confident I'll be able to sleep (I envy those of you who can do this with puerh and oolong).
Perhaps ironically, this reminds me of white tea in that it can be infused forever with no apparent ill effect on the tea. It just gets better and better. And keeps on going even with very long infusions.
I will definitely buy more of this tea. Is it worth it to get the huge bricks of this stuff or will it get flat and stale?
So far, I've been brewing mostly in a regular porcelain gaiwan with a few experiments with White Label duanni and Jianshui clay (mostly for its thickness), but it doesn't obviously improve the tea, nor does it really have any characteristics I want to change. I have a few zini pots I'm tempted to try but already use with different kinds of tea.
I really like this tea, it seems underappreciated.