Ferguson lobbed his body on the line a damn sight more than he should have done. He had issues which took Everton ages to get to the bottom to. Pretty sure Baz spoke about it and said it was a miracle he played as much as he did ( something to do with nerves in lower back that they couldn't diagnose for ages ).
He's got an FA cup medal, hated the rs as much as we do, didn't just save it for the big games, he done what he could when fit ( see hattrick against Bolton as proof of wasn't always about the big games ).
Lukaku is a better finisher but between a fit Ferguson and a fit Lukaku I'd take the big man every day of the week