My favored ideas: Harrell, Brady, or Lashlee, with free rein to run the offense.
What might happen instead: (i) Beck sticks on, with Tom doing most of the play calling; (ii) same as (i) but with "consultant" Greg Davis up in the press box as well, giving advice; (iii) some non-Beck "yes man" is hired at OC with Tom actually running the offensive show. These are not terrible outcomes, but I'd much rather get Harrell, Brady, or Lashlee, and let the OC run the show on offense. Tom can call plays, but I want him to be much less predictable.
An outside-the-box pick for OC: Hank Carter.