The new tubes are very good and unless you have a large tube collection from which to conduct endless trials, it’s usually more about proper sonic pairing than raw sound quality IMO. Telefunken ribbed plates can be bright, but the smooth plate variant is warmer - check which you have. The Russian "re-issues" are good to mix & match in 3 variants:
Tung-Sol - little extra energy up top
Gold Lion - just a touch of sweetness
Mullard - warm
Reissue Gold Lions are really quite nice as you’ve found, and their well tempered musical balance makes them a good "first guess" fit for most systems.
The best NOS tubes are more articulate with more 3D image, but if you don’t get the right sonic match then it doesn’t matter, as you’ve found out.
If you like re-issue Gold Lions you might like Amperex Holland, or black plate RCA (which you already mentioned), or even Tele smooth plates. The reissue Mullards and Tung-Sols track (somewhat) with their namesake vintage 12AX7. British Mullards are very warm.
I usually prefer Tele ribbed over smooth plates, incidentally, but you do have to deal with the brightness. If you can, I find them to be more detailed and dynamic. Mazda silver plates take this even further. Mazda silver with a Koetsu cartridge can be divine 😍
One brand I regret not exploring more in the 12AX7 space - Siemens. Their E88CC ended up being my favorite in the 6922 type, of MANY variants. They combine air & energy up top, sweet natural mids (bordering on lush) with top grade bass & dynamics. All while remaining super clean with top clarity. Almost seems impossible to pull off.