Finally went with Shevchenko at 25/1.
Repeating some of the points already made above, I reckon this is good value because apart from being the world-class player that he is:

He’s captain he’ll surely start all games.
Top scorer for Ukraine in the qualifiers.
He’ll have the best part of 90 minutes against a Tunisian defence.
He’ll have the best part of 90 minutes against a Saudi defense.
He’ll take most of their free-kicks.
He’ll surely take their penalties.
If they make it through to the last 16 it could be against the Swiss.