There's also 'Tom's Secret Admirer'. In this fanfic, the reader is secretly in love with Tom from afar. It has a lot of sweet moments as the reader tries to get closer to him without revealing their true feelings at first. It's a really cute and heart - warming read.
No, writing sexual fanfic about a real person is not appropriate. It invades their privacy and can be considered disrespectful. Tom Hiddleston is a person with his own dignity, and such works can also make the public view of him distorted.
FanFiction.net is also a good place. There are many fanfics dedicated to him there. However, the quality may vary, so you might need to spend some time sifting through to find the really good ones. You can look for the ones with high ratings and lots of reviews to start with.
Another theme is the exploration of their powers or abilities. If we consider their roles in superhero or other power - based movies, fanfics may explore how their powers could interact or be combined in unique ways. For example, if Brie Larson's character has super strength and Tom Hiddleston's has some form of magic, how would that play out in a story?
One great Tom Hiddleston fanfic is 'The Loki Chronicles'. It delves deep into the character of Loki that Tom Hiddleston portrays so well. The story follows Loki's adventures in a different realm, exploring his complex personality and his relationships with other characters from the Marvel universe.
One possible Tom Hiddleston love story could be about a fan who meets him at a movie premiere. She accidentally spills her drink on him. Instead of getting angry, he smiles and they start chatting. They find they have a shared love for classic literature. Over time, their friendship blossoms into love as they exchange letters filled with quotes from Shakespeare and other greats.
I don't have that specific knowledge. But you could try looking at entertainment news outlets or fan forums to find out if he's attending Comic Con 2018.