Can you recommend a simple Tube pre amp?

Greetings. I am looking for a simple tube pre amp. Do not need phono, tape loop, balance, treble/base, mute, loudness. Balanced connections would be nice but not required. Need just 3 inputs and 1 output. Would use this with a solid state amp in a multi zone system, so critical listening and sound stage presentation not so important. Tube warmth and detail, accuracy is important. Speakers only rated to 50 hz and will not be using a sub. Thank you for any suggestions. The tube world is so complicated with all of these niche players claiming the same thing.