Recommend The Best No Frills Preamp up to $5K.

There are tons of preamps, so you are probably overwhelmed with recommendations.

My suggestion is to audition the Bryston BP-19. It is the acclaimed analog circuitry from the BR-20, but minus all the digital sections. There are online dealers that have return policies if you do not have a Bryston dealer in your area. 

Happy Listening!

Backert Labs-Rhumba!

https://backertlabs.com/linestages-no-phono/

https://backertlabs.com/

I own the Rhythem 1.3.  While slightly out of your budget, highly recommended.  I bought mine used directly from Backert and have been very happy.  The circuitry is simple, only 2 tubes and the power supply is unique.  Worth checking out.  

de Havilland Mercury preamp is really good.  Kara took mine in, did a major cap upgrade and it sang.  Checked all of the boxes.  Only reason I do not still have it, not fast enough for active speakers.  Otherwise, it rocked.  Had a big sound for tubes. Also fun to own an outlier piece.  Kara was great to work with.  Good hunting.