Sounds like you've already done them but top would be Mike Ball or Spirit of Freedom (my preference) but sell out months in advance.
When are you looking to be here?
Day trips I like
Tusa because it's open gate diving and you have the option of 3 x 40min dives or 2 x hour or more dives. Less people, more crew, but it's pricey and currently getting motor changed so not running for few months.
See
here for a summary of the better ones.
Silversonic out of Port Douglas visits Agincourt (most southern of the Robbin Reefs) or Silverswift good but all guided dives which limits time a bit.
I'll DM you because some good deals on