I wouldn't trade Dak for the #1 and the #12 because, essentially, you'll have to find you another franchise quarterback. And if you pick him at #12, then you're essentially swapping Dak for the #12 pick. And I think Dak is worth more than the #1 pick in this draft.
However, if you add #1, #12, #33 and #65, I'd do it. Why?
Because as much as I love what Dak has done, I believe he benefited greatly from this offensive line and the running game. I find it hard to believe that another young quarterback couldn't come in and, while not having anywhere close a season as Dak had, find some measure of success with this offense.
Besides, we can't be sure Dak will continue to progress, although I think he will. It's not like Dak will be the last great quarterback that comes through the draft.
So with the three picks extra picks plus Romo, you could take ...
#1 Myles Garrett - DE
#12 John Ross - WR
#28 Budda Baker - S
#33 Zach Cunningham - LB
#60 Kenny King - CB
#92 Chad Kelly - QB
Sorry, love you, Dak, but I'm taking that haul any day.