Up to what Episode/Chapter of One Piece should i see before playing each of Bandai Namco's PC Games?
I doubt if you can keep off from watching the series as the requirement for the first game itself makes you curious for the following arcs. Yet, here is my answer based on the character list seen on wiki/google of games you've mentioned. All the arcs I've mentioned are till the end(inclusive).

Pirate Warriors 3 - Marineford arc.
(2016) Burning Blood - Return to Sabaody Arc.
(2017) Ultimate World Red - Dressrosa arc (could be an overestimate)
(2019) World Seeker - Wholecake Island arc.
(2020) Pirate Warriors 4 - Wholecake Island arc.