How could law parallel to white beard?
Luffy's friend, and the world sees them as equals in strength. Both sitting at 500 million berry bounties. People in the One Piece World know who really took down Doflamingo while in a 1v1, but not many. I think this is proof to show you that Whitebeard wasn't really as strong as Roger. Roger would never fight Whitebeard with everything he had. Look at Luffy's Gear Fourth. He wouldn't use it in a duel Law wanted, because they're friends. That would make them very equal in strength.
When we got people asking, the only answer Oda would give us was from Law, who only addressed his crew, and told them it was all Luffy. I feel like for Luffy, it's different. He'll destroy the Celestial Dragons, who write history by altering stories like they did with Doflamingo and every other thing Luffy was a part of. So unlike with Roger, they won't and can't make him seem equal to any pirate. Even still, Law and Kid will chase Luffy as he grows himself. Luffy is almost at Big Mom, Law is at Wano and Kid is at Kaido already. Their bounties are 500-500-480million. With all of them about to make some noise, but not defeat an emperor, they will all rise at the same time. They will be the new eras big 3. Watch Kid gain his biggest rise when he destroys something huge, or escapes something thought to be impossible, like Impel Down, but without help.