My experience with the 12AU7s are limited to use as drivers and pre-amp tubes in my Rogue Cronus Magnum and as the output tube in an Eastern Electric DAC and DAC Plus (both modded). (What works best in my system is NOS Mullard drivers, RT pre-amp and DAC tubes.)
That said, I have the same impression of most of the tubes you've listed, Bob, but what I hear differs in a few respects as follows:
Radiotechnique (1965 vintage, 6189 version): my favorite. Beautifully balanced from top to bottom, three dimensional, and resolving, with very nice tonal accuracy.
The Amperex are very well balanced and perhaps even more resolving, with a beguiling airiness to them but perhaps lack a little weight compared to the RT and NOS Mullards. The latter I also like but I agree that there is a touch of tubeyness to the bass
The Sylvanias are similar to the RCA Cleartops but not quite as bright on top. The GE 5814 is also similar but even better balanced tonally than the Sylvania.
The Raytheon/Baldwin black plates are definitely the best buys around and also just as you describe. The RCA black plates are similar.
To me the Shuguang are good but a touch clinical/not rich enough, the EH are muddy, the new Tung-Sol and new Mullard un-impressive (don't remember why), the new Genalex not any better than the new Mullards.
I actually like the JJ ECC82 short plate (the ECC 802 long plates are a little noisier) the most out of the new production. Well balanced and warm, if not particularly resolving. Rogue uses them as standard equipment in their gear. Jim McShane, on the other hand, doesn't think they're reliable (I've had no problems though I've only used them for a few to several months).
NOS Tung-Sol are warm and therefore easy to listen to but have a thickness to them that becomes annoying after a while. Same with Tungsram.
IMS, IMHO, blah, blah, blah.