It seems to me that ego is essential but how big might an ego be and how important is it in achieving success?

Ego is okay as long as awareness is there too - to acknowledge when Ego is asserting itself. This helps to minimise it's power. Ego is closely related to, for example, anger, right and wrong and judgement!!

Can one imagine creating with the unique objective to share and give to others? With no aim to get any reward or recognition?
Or does this idea in itself could be another way to satisfy the ego?
Well I suppose my first thought has been a little too idealistic!

Hmmm, I guess it could be a way to satisfy the ego - I feel recognising that fact by cultivating awareness is a step in the right direction though. What do you think?
Just recognising that it is what it is can be enough to keep ego in check? It's when we blindly live our lives on autopilot when ego becomes a main identity that can delude us ...