What is the most appropriate course of action for the seer to take in light of his visions indicating his marriage to one of the suitors, his rejection of another, and one of them rejecting him, taking into consideration the importance of not hurting the feelings of any of the suitors, especially since they are people of the Qur'an?

If the first fiancée is religious and beautiful, seek Allah's guidance (perform Istikhara) and proceed with marrying her. If the matter is facilitated, then it is good; if not, then there is no good in it for you. Do not inform the other two women of your intention to propose to them. If you have already informed them, then apologize to them. One must be cautious in dealing with non-mahram (definition) women. A true dream is a sign of good, and it should only be narrated to one whom you love.