let's face facts:
At the end of the civil war---imperial side:Jarl elisif(seriously wtf is she supposed tu do for skyrim?She just complains for the death of Torygg).maven black-briar (a criminal who wears a noble dress),Jarl Idgrod Ravencore (a crazy old lady who looks permanentley under drugs)Jarl siddgeir (a boy who wastes the money of the hold in dresses and hunting).Jarl Kraldar(he's ok...doesn't hate the college of winterhold)Jarl Igmung ("I is invicible!!!My city is made of stone!!!loooool)Brunwulf free-winter(he's ok,but doesn' t look like he could give a damn about the war) Balgruuf (he sides with th empire just for fear,IMO).
---Rebel side:Jarl elisif(remember that her husband would have fought the empire,had ulfric asked him to do so).Laila law-giver(Albeit a bit naive,wants to get rid of criminals and corruption) That gal who take the place of Idgrod(A young miner,hard worker and smart lady)Jarl Degneir(Honest experienced jarl who cares for his people,The original jarl of winterhold(He's an Idiot but hey...does winterhold even count?)The silverblood dude in markarth(rich nobleman willing to fight the empire and get the reach rid of the forsworns)Jarl Ulfric(willing to bash thalmor arses and make his homeland great once again,knows the tu'hum,strong fighter)Vignar gray mane(leader of a strong family of warriors)
(for me jarl Sklald and the imperial gal of dawnstar are pretty much the same)
Concluding,the stormcloacks jarls seem more willing to fight the thalmors.Also,half of the soldiers of the imperial legion are not nords,but imperials,mostly fighting for profession,while the stormcloacks are all fighting for they're freedom.
Sorry for bad English.
Stormcloaks do not like any race, except Nords, but I wouldn't mind if Laila Law-Giver was still a Jarl in Riften, she is the best. I hate Skald, he doesn't really care for his people. Brina Merilis cares more about Dawnstar than Skald.
I can agree with you with Maven Black-Briar, as she is more of a Criminal, and DOES NOT deserve to be Jarl.
Korir[Original Winterhold Jarl] is pretty much an Idiot, and doesn't deserve to be the Jarl. Kraldar is better than Korir, and doesn't blame the College of Winterhold about the Great Collapse.
Sorli the Builder[New Morthal Jarl] is very trustworthy, but some flaws are with her. She doesn't have experience in being a Leader[Excluding Stonehills Management]. Idgrod I can agree with you on that one. She doesn't deserve to be Jarl. I rather have her daughter, Idgrod the Younger, to be Jarl.
I can agree with you about Siddgeir, but one thing that I don't agree on is hunting. He doesn't spend on hunting, instead he spends on Mead and Ale. I rather have Dengeir as the Jarl of Falkreath.
Elisif would be on the Stormcloaks side, but alas, Ulfric Stormcloak murdered her husband, and doesn't trust him. Although, Ulfric deserves to be High King in his opinion, but Elisif has a legit claim to be High Queen.