I am a big fan of TV shows, and I watched a lot of them. I would like to give you my opinion on most of them.
The Vampire Diaries has 8 seasons. It's supernatural drama (also horror and romance). This is personally my favorite TV show. 10/10
The Vampire Diaries
If you watched The Vampire Diaries, you know who The Originals are. You have to watch this after you watch The Vampire Diaries. 10/10
The Originals
Finally, third in a row is Legacies. After The Originals you have to watch Legacies. The main character is Claus's daughter Hope. 8/10 (too many unnecessary monsters)