Bees (other than bumble bees) are not native to North or South America. I would guess that bumble bees, moths, hummingbirds and butterflies did most of the pollination before Europeans Arrived.

There are even moths that mimic hummingbirds[1]. First time I saw one, I thought it was a hummingbird.

[1] https://en.wikipedia.org/wiki/Hemaris

EDIT: I meant European Honeybees, but still news to me that sweat bees and the like are considered bees as well. Interesting.