Im looking for a manga where the main character is pure and innocent or really genuine in his intentions. There also needs to be romance for the main character. It would also be nice if the main character had a large impact and effect on other characters making him important to them although this isnt necessary since this might be hard to find. Note: the character doesnt have to be "good." For example, GTO is a good example of what im looking for and the main character isnt an ideal role model but is genuine in his feelings of wanting to help his students. Other good examples are:
Angel Densetsu (a pretty perfect example, except for the artwork)
Shibatora (though i wish there were more romance)
Hajimete no Aku ( the main character says hes evil but hes actually really pure and innocent and in one chapter its revealed that hes important in his village)
and thats all i could think of. Please help me and thanks for all the help.

Akuma to Love Song
Beast Master
Nanaco Robin
Kimi ni Todoke

Or does it have to be a dude? o_O Toradora! maybe?

Liar Game!

-Psycho Busters ( great shonen action manga with romance and great artwork)

-Alive: The Final Evolution( everything u are looking with a great story that doesnt use any cliches. Romance doesn't appear till later in the manga but it is present and its not half bad)

Kiseijuu ( similar to Alive and the romance is near the end. Great manga)

________________


Current Favorite:Seishun For-get!
Manga That Needs More Attention: S Senjou no Tena

Fruits Basket, maybe?
And Hoshi wa Utau.
The author likes her main girls innocent.

________________
Hrodulf and Bjornolfr, you will not be forgotten.

And if the world were black and white,
you would be my rainbow in shades of grey.

Click 'n Play!

If I had a fantasy self, it'd be a tentacle monster.

Superior fits into thar category.

________________
"Thus is our treaty written, thus is agreement made
Thought is the arrow of time, memory never fades
What was asked is given, the price is paid"

Saijou no Meii seems to fit, though the romance is just a side dish.

Otomen from the short amount I've read and what I can remember
Team Medical Dragon although there's no romance as such. TMD fits more with your example of GTO than the 'pure' character

________________
I am the master of my fate;
I am the captin of my soul.
William Ernest Henely

I rate manga with 5 being the average score.

The main character from Dear Mine.

Ii Hito. <3

The very pure, but flawed protagonist of Dengeki Daisy.

And if you're okay with (extremely mild, almost non-existent - you probably won't even notice it) shounen ai, then Asterisk, The Ice-Cold Demon's Tale, Silver Diamond and The Betrayal Knows My Name all have incredibly pure and genuine protagonists who also affect the people around them with their pure-heartedness.