Steve Jobs also had a lot of success with Pixar. Bought it for 5 Million - sold it for 5 Billion, I'm not sure of those numbers but I think they are close.
Definitely don't sell Apple... I don't think Jobs' success is overstated, but even without him there is no reason this company should fail to thrive... they have some of the best integrated electronics products in the world, almost Japanese level technoligy...