Do you think greatness is "greater" through immediate or long-term impact?

Does greatness through immediate impact, such as conquest (Think men like Caesar or Napoleon) or greatness through work that outlives the creator (Shakespeare, Kafka, Newton) entail more preferable legacy?

(Obviously most don't care about legacy as it's something that's reserved for the dead, but if you had to choose. I ask because we look to the great leaders and all their tangible work has expired/crumbled; think of the poem Ozymandiaz. While the ideas of thinkers and writers can still influence those today as much as when they were first put to word. I'd love to hear diffrent views and thoughts on this!)