I gotta disagree with Jaya
Montblanc Cricket was the MVP with Luffy or without Luffy hhhhh
The dude truly was an exceptional character, and without him, kiss goodbye to Skypea arc!
Also, he two of the coolest moments in series:
1- With Usopp when Usopp called him a liar cause he was too scared to ride the knock up stream, his response was GOLD: I'm glad I was able to meet fools like you!
2- With Bellamy, bloodied, and getting sarcasm about pirate dreams, he responded: a person who doesn't have guts to dream, has no right to speak of pirates!
What a character!
I like Montblanc Cricket as well. His backstory and pursuit, Sacrifice, Will, and everything else about him.
However when I think about Jaya 3 Scenes come to mind.
The Bar Scene (Bellemy attacks)
Blackbeard (Peoples Dream's never end)
100 mil bounty Reveal (When luffy gets back the treasure)
Montblanc is great and all but personally I believe most other people will also agree that Blackbeard Jaya scene is in the running for most iconic moment in One Piece history.
Montblanc was vastly over shadowed by Blackbeard and his speech, his reveal, Impact, suspense, character and so much foreshadowing.
It's all personal taste though so there really isn't much to argue about. If Montblanc had a greater impact on you and you believe it to be this way, I can't convince and don't even want to otherwise.