For me, Chris Pratt actually covers the whole spectrum of Alistair, both in fit dude and chubby bear mode.

And he also comes with preset expressions for his Thedosian Life:

When arguing with Morrigan

When the Warden shanks another bandit creatively

When the Fereldan Coronation Banquet has a dedicated cheese platter table

When most of the cheese platter table is cleared by him

The potential is endless!