I'd say 'Naruto' is a top choice. It has a rich world-building, diverse characters, and a conclusion that ties up most loose ends. Plus, it's had a huge influence on the manga industry.
One great romance manga is 'Fruits Basket'. It tells the story of Tohru Honda who lives with the Sohma family, some of whom are cursed to turn into animals of the Chinese zodiac when hugged by the opposite sex. It has a wonderful blend of romance, comedy, and drama. The relationships between the characters are complex and deeply emotional, making it a very engaging read.
'Nisekoi' is full of plot twists. Raku Ichijo is forced into a fake relationship with Chitoge Kirisaki to keep the peace between their rival gangs. But as the story progresses, there are so many twists and turns in their relationship. There are also other girls who may or may not be the girl with the key to Raku's locket, which was promised to his first love. It keeps you guessing all the time.
Well, 'Nana' is often touted as a top romance manga. It delves deep into the emotions and relationships of the characters. The art style is also captivating.
There are many good love comics that you can refer to:
1. Your Name. (Your An animated film directed by Makoto Shinkai tells the story of two young people who discover the meaning of their existence to each other through the exchange of experiences in their dreams. It's very touching.
Attack on Titan: A very popular Japanese manga story about humans fighting giants to protect their walls. It is full of exciting battles and touching emotions.
3. Steins;Gate: This is a comic about time travel, about a group of scientists who use time travel experiments to discover some shocking facts.
" Your Lie in April " was a very touching romance manga about a young man who discovered that his teacher was a snail he had once saved, and a wonderful love story unfolded.
5 Death Note: This is a story about a genius high school student and a mystery full of thrills and suspense, while also exploring issues of morality and justice.