My son fits your profile question. He is a 1st baseman at a good D3 school. He his 6'3", 220lb, LH 1st baseman.
He is there because he is a good student first and can hit, both for average and power. Like the comments before, he doesn't have great speed and has an average arm; but fields his position well and can snag almost any ball thrown his direction.
From experience, if you can not play solid defense, you will likely not play. However, with solid defense, the focus turns quickly to hitting.
In the end, he ended up at the school he is at because he had the grades and test scores.