I read Shevek less as a trickster figure - he doesn't have in any sense the "force of personality", the unpredictable charisma, the untethered eros - and more as a figure of rathere austere autistic disconnection, almost egoless or at least without a strong social selfhood. He has no sense whatsoever of rank or clout. This is what enables him to move between social systems, almost equally inassimilable to both Anarres and Urras. Although a doctrinally committed Odonian, he doesn't actually have an Odonian "spirit" - his form of commitment, to the limit-point of an idea, breaks with any mutualist conception of how knowledge is created or for whom.
Another SF narrative about an individual who acts as a wildcard within their society is Arthur C. Clarke's The City And The Stars, which I always loved.