You really need a good preamp to have incredible midrange, depth and texture, resolution, etc.Sorry but it must be coloration’s your hearing, and if you like that that’s fine it suits your system, some like to color the sound of their source if not happy with it.
But it’s impossible for a preamp to make up (midrange, depth and texture, resolution) itself, and then add it to the music that comes from the source information. Better off getting the sound of the source right.
Classic Ivor Tifenbrun (Linn) saying,
"It all starts at the source, get that right and your 1/3rd of the way home, get it wrong and your forever chasing your tail changing things to make up for it".
Cheers George