I disagree on the ranking. JO deal shoudl be in first, because it set up ground for Marion trade (and subsequent losing of Bosh) and for Hedo signing.
All three moves have one thing in common.
Going over top, paying big money, putting all eggs in one basket, hope a splashy move will make a splash in team performance.
At number 4 is probably Calderon
signing. Again, pompous promotion to starting PG, solving the PG controversy etc. Many years, big bucks. Not noticing the apparent problems.
All BC's "best" moves were small under the radar tweaks that nobody thought would make a difference