I like Simmons, but I think Ingram is the best fit for this team.
My dream scenario is that we win the lottery and then immediately get on the phone with whoever ends up with #2 (Philly, LA, PHO, etc).
We then trade down to #2, and ask them to cough up a future 1st or two, or one of their solid prospects.
Hypothetical scenario:
Celtics land #1
Philly lands #2
We offer #1 and the Mavs pick
Philly sends us #2 and Okafor.
This of course assumes Philly had been tanking to win the Ben Simmons sweepstakes.
We then draft Brandon Ingram, and pry a big-man prospect who has underperformed so far, but still is light-years better than any big-man in this years draft class.