Which one of these herbs can be taken w/ finasteride or tamsulosin? beta sitosterol, pumpkin seed oil, curcumin turmeric extract, quercetin?

There is no medical study which has tested taking these supplements with the meds you mentioned. For healthy young people who eat a healthy diet there is no need for supplements for not only they are unregulated so you do not know for sure how much or if any of it you take- they are expensive. Best is to use that money for something good for yourself - or even charity. Wishing you good health