Schiit Tyr and Freya+ are top notch gear. My own experiments with my Freya gave best results with Ken-Rad VT-231’s in the gain stage and CBS-Hytron (made by RCA?) 5692’s in the buffer. It gives my Cary SLP05 with ultimate upgrade a run for the money.
For a budget option, Sylvania 6SN7’s of any vintage are pretty good with a sparkly top end. But this preamp sings with vintage tubes, especially of the WW2 era. The Tyrs are amazing, I have been so impressed when I have heard them (and the Schiit Wotan amplifier as well).

