Obi-Wan is the model for the JK while Yoda is for the Consular, its not that hard to see.
Obi-Wan is focused on lightsabre combat. Sure he was sent on ambassador-missions, but so were all the Jedi. Yoda while fighting Dooku relied heavily on using the Force to throw and deflect objects and lighting, before going into lightsabre-combat.
While Yoda was one of the most powerful force users he was also one of the best lightsaber duelists.