"I'm looking for smooth, long-tones, somewhat soft"
Develop a suitable film properly, and you can get that easily on silver paper.
TMY is a good place to start. Print with Selectol-Soft or LPD instead of a super contrasty developer like Dektol.
One of the reasons folks get such good results with Palladium/Platinum & Carbon is that it is so expensive that we are careful with our negatives ! Silver or Alt, make the proper negative, get the results you want. Some careful workers print silver and palladium from the same negs.