Best? There is no best. People nominate and "you" vote (elect) with your ears and wallet.
Tube preamp: I nominate Conrad Johnson's top tube preamps as some of the best.
For amps: Depending on the speaker, I'll campaign for Nelson Pass's XA.5 series in solid state. Tube amps? That's a tough one. Lots of good candidates and a lot depends again on the speaker. View the amp/speaker pair as one ticket (President/Vice President? Gotta stay the analogy). Of the brands you mentioned, I like the totl Sonus Fabers.
Other possibilities for a SOTA system: OTL's with the right speaker. SET's with the right speaker. Planars with the right amp.
Remember to have fun.