The tubes I've settled on are Mullard 12ax7 goal posts, either halo or square getter. These are from the late 50's.
And Telefunken E88CC (6922). If you can find Telefunken E188CC they might be even better.
I am going to try Amperex Holland D-foil getter 12ax7 soon as an experiment.
PS: I did not like the Telefunken 12ax7 or the USA Amperex 7308. These comments only apply to Aesthetix as these tubes could be ideal in other applications.