Bro Rich-Wayquira {Leviticas} 21

Teaching on the differances among priests and the Koen ha Gadol or High priest in funeral rituals and especially pertaining to the topic of marriage. Are we spiritual Levites today? Is there such a thing?  1Tim4 says that to forbid marriage is a doctrine of a demon. The renewed covenant explicitly states that a change in the priesthood has occured, and yet people are wanting to bring a presently non functioning priesthood ordinances over into this present dispensation and this is error. Then when you actually check out Is and was polygyny forbidden to the priests...the High priest? Or has the socio-political-religious teachings of the past 1900 years turned the bible into a doctrine of devils? Leviticus 21 tells us very detailed information on the kadosh marriage practices of the priests and nowhere does it mention a limitation nor is there any command to abstain from polygynys marriage.