In Hamlet Act V, scene i, Gertrude's eulogy is brief:
Sweets to the sweet: farewell!
I hoped thou shouldst have been my Hamlet's wife;
I thought thy bride-bed to have deck'd, sweet maid,
And not have strew'd thy grave.
Polonius, if he had been alive, would have agreed with anything the King or Queen said. He would have liked the word the Queen called Ophelia, a "maid" (a virgin), though he knew she might not have been. (Branagh's film version shows that she wasn't.) Polonius was paranoid the entire first act that Hamlet had seduced her. So was her brother, and he jumps into her grave out of overprotectiveness bordering on incestuous jealousy.
Polonius was a fawning fool. Gertrude might have said that she hoped Ophelia would have been the gravedigger's bride, and he might have agreed. Alas, I exaggerate...
Not only would Polonius agreed with the marriage, he would have echoed her speech with a long-winded one of his own. Two hundred words on flowers, death, and marriage. All of it nonsense. Remember what Gertrude told him earlier: "More matter and less art."
Polonius was a windbag and a hypocrite. He used his daughter as a pawn for his own spiteful fetishes and for the King and Queen's vicarious meddling into Hamlet's state-of-mind.