The most tube-like ss amps in my experience were the wonderful Herron M150 Monos. Great amps, and so liquid and efforless. I would check out Keith Herron's newer M1s too. The Herrons are sweet but not euphonic, and will take control of the Maggie's bass. They just sound like music.
I also love and second the rec for the VTL 450 tube amps.
I also love and second the rec for the VTL 450 tube amps.