Well, 'Goku's Unseen Bond' is a great one too. The author creates an interesting oc who enters Goku's world and they form an unexpected bond. It's full of adventure and the way their relationship unfolds is really engaging.
One great 'goku and oc fanfiction' is 'A New Saiyan in the Universe'. It has an interesting plot where the OC is a Saiyan from a lost colony. The OC's journey to meet Goku and their adventures together are really exciting.
One popular 'goku x female goku black fanfiction' might be 'The Unlikely Bond'. It explores a unique relationship between Goku and Female Goku Black. In this fic, they start off as enemies but gradually discover they have more in common than they thought.
A really interesting 'goku and oc saiyan fanfiction' is 'Goku and the Mysterious Saiyan'. The oc saiyan in this one has a mysterious power that even Goku is intrigued by. Their interactions are filled with a sense of wonder and discovery. The story also delves deep into the Saiyan heritage and how this oc saiyan fits into the overall scheme of things in the Dragon Ball world.
One popular fanfiction could be 'The Bond of Buu and Goku' which explores an interesting friendship between female Buu and Goku. It has some really cool action scenes and character development.
Well, I know 'The Saiyan Heart'. In this fanfiction, the female Goku and Vegeta's relationship starts from a series of battles and gradually turns into a deep emotional connection. It shows how their Saiyan pride still plays a role in their relationship but also how they overcome some traditional Saiyan behaviors for the sake of their love. There's also 'Destiny's Union' which is quite interesting as it brings in some new elements to the Dragon Ball universe while focusing on their relationship.
The plot also needs to be engaging. It can involve saving the universe from a new threat where the oc and female Goku team up. Or it could be about exploring a new world together, with lots of twists and turns to keep the readers hooked.
I'm not sure about specific 'naruto x female goku fanfiction' stories off the top of my head. But you can try searching on fanfiction websites like Archive of Our Own or FanFiction.net. There might be some interesting crossovers there.
There is a really engaging 'goku x female vegeta fanfiction' titled 'Love Among the Saiyans'. This story delves deep into their relationship. It starts with a simple encounter during a battle, but then it unfolds into a complex relationship. Goku's carefree nature and Female Vegeta's more serious demeanor create an interesting dynamic. As the story progresses, they start to understand each other better and develop feelings that are not just based on their Saiyan warrior status.
There's 'Gohan and Goku: A New Chapter'. In this fanfiction, Gohan discovers a new power within himself with the help of Goku. It's a story full of action and also shows the father - son like bond between them in a fresh light. The author does a great job of keeping the characters' personalities intact while adding new elements to their relationship.
Yes, Archive of Our Own (AO3) is also a great source. You can search for 'usagi x goku' and get a bunch of results. Some fanfictions might focus on their friendship and how they could learn from each other's skills and strengths. For example, Goku's martial arts skills and Usagi's leadership and magical abilities could be combined in interesting storylines.