The preamp section of the EA stuff is great, as is the onboard preamp on the ‘ray. With that in mind, maybe a preamp isn’t what you should be looking for at all. Maybe a drive or dirtbox would serve your needs better. Or a compression that saturates a bit. Or both.The Euphonic head has great EQ, but is also very clean. I love the growl of a GK head, but the Euphonic is really good with my Warrior.
The pedal market is so saturated (see what I did there?) right now that it’s easy to get swamped with options and the line between preamps and overdrives has gotten extremely thin. I suggest maybe looking for a compressor that saturates or a simple overdrive rather than adding yet another preamp/EQ section to your chain.