I went with Vegeta, but in truth depending on the day you ask me I feel like I could say pretty much any of these options except Yamcha and Krillin. I just feel Vegeta would probably come out of my mouth more often than not because he had the common decency to remain relevant all throughout, which I can't say for anyone else besides Goku on here. And Vegeta has a tangible character arc, which definitely makes me prefer him over Goku for the most part. And to clarify, Goku doesn't need a character arc, he's great the way he is, having one just makes the character more engaging.
Gohan would probably be the second most common for me, he and Vegeta are really close and I almost voted Gohan but that relevant thing gave Vegeta the edge.