Hibbard has been selected alongside Scarlets hookers Matthew Rees and Ken Owens in Wales' 35-man squad but Humphreys believes Hibbard's tenacity and quality in the set-piece stands him above anyone else.
"I think he is the best hooker in Europe," said Humphreys.
"I'm biased but I spend my life looking at opposition, looking at other hookers' strength and weaknesses.
"The kid is 112kg, phenomenally aggressive, outstanding at set piece. What more do you want? The kid can change games. He is very important to us [the Ospreys]."
Humphreys also praised Hibbard's determination to return from a shoulder injury initially suffered in Wales' autumn international against Samoa in November.
A slight knock picked up in the clash against Leicester on Sunday puts his selection for Wales' opening game against Ireland in doubt but Humphreys insists he's a tough cookie.
"I thought he was phenomenal on the weekend. Here is a kid who has got a bad shoulder. We had to manage it all week and the first couple of minutes in the game he is smashing into people," added Humphreys.
"He's a loyal kid. He wants to play. He wants to do his best. With one shoulder he was phenomenal on the weekend and I hope he starts for Wales.
"You have got to bear in mind he came back in less than half the time [the medical staff] said. We have people out for ten weeks and he came back in three."
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