Best OG Dragon Ball Saga?

As much as I like the King Piccolo arc, it took so many story beats from the Red Ribbon Army arc. Kinto'un gets destroyed in both. Goku gets defeated and the villain leaves because he thinks that Goku is dead. This is done objectively worse in the King Piccolo arc because Goku's heart starts beating again for absolutely no reason. Then, Goku has to get some special water from Karin in order to power up and defeat the villain. Again, this is handled worse-at least in the manga-in the King Piccolo arc. The changes made to this in the anime are much more interesting, though.

Because of this I have to say I prefer the Red Ribbon Army arc. However, I love how dire the situation against King Piccolo feels. Seeing him kill Shen Long is still one of my favorite scenes in the franchise.

RED RIBBON ARC WAS SUCH A FANTASTIC ADVENTURE

It's the first hunt for the Dragon Balls for me; Pilaf and his goons are some of my favourite villains of all time, Yamcha being introduced as this cool desert bandit who then turns out to be a goofy idiot (he's still my favourite character from OG despite everything), general misadventures, and as short-lived as it was I do like how Bulma and Yamcha both kinda get what they wanted to wish for along the way. It's short and sweet, and I'd probably even say it's my favourite arc of Dragon Ball as a whole.
I do like all the Tenkaichi Budoukais, they absolutely do stick the landing when it counts; Goku versus Tenshinhan is the best fight in the entire series, and the announcer does a fantastic job of things, but I think they all just have parts I'm not super fond of. I also now realise the irony of me saying they stick the landing right before mentioning Goku versus Tenshinhan.
The Red Ribbon Army was my least favourite part of OG and it's also the longest, which isn't an ideal combination. Can't say I quite remember why though, it just wasn't doing it for me really until the fight with Murasaki, and the less said about Colonel Blue the better.
No issues with the Piccolo Daimaou saga, it's just not my favourite.