There cannot be a ranking list for all DACs because DACs are like other gear in that you can categorize them by their design and the likely sound signature based on that design.
You need to figure out what sonic signature you like. If you like warmth, then maybe a tube DAC would be on your top tier while another person may find that type of sound at the bottom tier.
Or one can argue that the DAC or TT should be neutral, and amplifiers and speaker should be neutral.
And then people spice to flavour with a tube preamp or a DSP?
But @yyzsantabarbara I agree that a Tube DAC on an existing SS setup might be a winning proposition.
The other obvious (?) difference is in features, EQ, user interface, streaming options… etc.
It almost doesn’t matter if it is the best, and is only $50, if it is painful to use.