Pretty Vampires
Bunny Foo Foo
Somehow I do agree with the OP but beside all of the above, the Jarl who really reward the dragonborn for helping him, is the one in Raven Rock. He gives you a house for free and 10k on the top of that for helping to avoid his assassination.
We helped Balgruf with the Dragon attacking but still he only grants us to buy a house and to become a thane ... but he does continue treating the dragonborn kind of bad. The best Jarl after the one in Raven Rock in my opinion, is the lady in Solitude. She is kind of sweet and ask you nicely whatever she needs from you.
The guy in Raven Rock gave me 20 k and a house.
Balgruuf is an example of a guy that was born into his role. The Dragonborn? Sure, but he/she was picked because the potential greatness they had.
I don't like Ulfric, but I always got the feeling that Balgruuf was jealous of him. From what I hear, Balgruuf wasn't able to learn to shout, while Ulfric knows 4- of them.
Balgruuf is not a great jarl. He can't even raise his kids right, even though he sits on his ass all day.