Risa

Um....pretty sure Deanna Troi was the one giving therapy to Jean-Luc. And she saw some shit during that voyage. Seriously, she needs her own counselor.

I think it's implied that DS9 had multiple counselors but they just aren't bridge-level personel. Ezri later becomes the most prominent counsellor but we also see O'Brien going to therapy with Telnorri, so it's implied the station does have dedicated mental health staff.

I would say that technically should give DS9 the upper hand, but Miles' experiences with Telnorri aren't exactly great and it does seem like DS9 is always given the bare minimum by Starfleet.