Recommend a dac that contributes to system for tight bass

If it is in fact not the bass but the low mids you are looking to address, why not simply buy a Schiit Lokius EQ and see if that does the trick?

A lot cheaper than buying a DAC and you can return it if you don't like it. 

As I read through this thread a part of me couldn’t help but wait for the punchline that the real culprit was a phono stage that is overdoing the bass. I’m a little twisted that way. Interesting that adjustments to the source and cabling made enough difference to satisfy the OP. Because things usually come down to implementation, it always amazes me when the least complicated isn’t far and away the best. Reading physical media in real time without error correction seems complicated.