Your sentence - The tycoon contributed more to the candidate's profile than anyone else in the industry did.
The tycoon contributed to others. The tycoon contributed to the candidate's profile. The tycoon's contribution to the candidate's profile is more that his contribution to others.
Correct sentence - The tycoon contributed more to the candidate's profile than did anyone anyone else in the industry.
Others contributed to the candidate's profile. The tycoon also contributed more to the candidate's profile. But the tycoon's contribution was more.
If you see the subtlety, in the first, you are not comparing others contributions and tycoons contributions. You are just comparing others with tycoons contributions.
The "did" in the end of the sentence modifies industry.