For posture and position:
* Upright: He stood *upright* and proud.
* Straight: She stood *straight* as an arrow.
* Firmly: The soldier stood *firmly* at attention.
* Proudly: He stood *proudly* next to his wife.
* Awkwardly: The child stood *awkwardly* in front of the crowd.
* Uncomfortably: She stood *uncomfortably* close to the edge.
* Precariously: The statue stood *precariously* on its base.
* Immovable: He stood *immovable* despite the pressure.
* Still: She stood *still* and listened intently.
For actions:
* Patiently: They stood *patiently* in line.
* Quietly: She stood *quietly* in the corner.
* Bravely: He stood *bravely* in the face of danger.
* Regretfully: He stood *regretfully* by his decision.
* Hesitantly: She stood *hesitantly* at the door.
* Impatiently: He stood *impatiently* waiting for the train.
* Expectantly: They stood *expectantly* as the curtain rose.
The best adverb to use will depend on the specific context and the meaning you want to convey.