I’ll throw in another vote for AMT. I had a full pedal rig a few years ago around an AMT P2. It’s an excellent preamp, has 3 different outputs (front of amp, preamp, and cab emulated), and has a fender style clean channel instead of being bypassed.
The AMT Legend 2 pedals are all really good, but the P2 especially I recorded excellent quality sounds with it and played with it live and it is my vote for a fantastic preamp pedal.