What's the best EL34 amp besides 8b?

For me the Air Tight ATM3.
Mine will soon be an ex teen ager and still trouble free exept changing tubes when necessary. Sound is absolutely wounderfull. Really underestimated amps

Yes, the H/K Citation 2 is an impressive amp- my favorite from the classic era.

The Dynaco was introduced in 1959, and over 350,000 ST-70's had been sold when production finally ceased, making the ST-70 the most popular tube(not just EL34) power amplifier ever manufactured(though perhaps not, "the best."

The ST-70 is a good amp, but at full power the 5AR4 rectifier is under stress. They should have designed it for a pair of them.

There is an excellent thread on the ST-70 design over on Audiokarma.

Gianttube, in case you might still be reading this, another perspective.

I don't believe there is a "best" of anything. Any component is dependent on match up with the remainder of the system.

Now if this is of any interest, I recently bought EL-34 based amps. I began my audio hobby decades ago with a Dynakit ST-70. Later I owned the famed 8B, followed by a Music Reference RM-9. I considered each of those to be a step up and I always admired the musical mid-range of the EL-34. My recent purchase was a pair of Manley Snapper mono amps. The retain that mid-range charm but offer a more extended frequency response, particularly in the bass. However they have 4 outputs per channel and 100 watts which may exceed what you are looking for.