Natasha had stronger chemistry with nearly every single Avenger on the squad, from her longstanding relationship with Clint Barton to her close relationship with Steve Rogers.
Because of his generosity and selflessness, Steve Rogers was considered deserving of the title of Captain America when he made his MCU debut in Captain America: The First Avenger.
Sersi and Ikaris' chemistry in Eternals was heavily criticized, despite the fact that the two did have some adorable moments together.
When Thor was exiled to Earth, he first encountered scientist Jane Foster, and they hit it off right away. Their obvious love for one another made them one of the first couples in the Marvel Cinematic Universe.
Throughout the entire series, there has been a simmering love tension between the two, which they finally resolve with a kiss in the season finale.
A facet of Spider-Man that the MCU has successfully included is Peter Parker's uncomfortable high school relationship.
Given how infrequently their romance is mentioned in Black Panther, Okoye and W'Kabi's relationship seems to have been one of those that you blink and you miss it kinds.