When I was working at a major facility (as an assistant) around here I used to put an LA-2A accross the drums' bus, and on top of that an SSL bus compressor accross the stereo bus of the console: that worked wonders on my mixes, fattening and giving a really pleasing punch; for a more budget oriented purpose (...) try getting an Aphex Dominator or Compellor: they can be found for quite cheap on the used market, and still can do the trick for that task, be aware they're not "gentle" or transparent devices, they have a sound, which you may like or not.
Sony 800 G, Royer 121 (FRONT END) WITH HIGH GAIN PRE, or U 67 (maybe an 87)... into:
A design's MP-2 (or MP-1, A much newer best kept secret) for a 'tube' sound, an NTI pre for tighter R&B sound, A 1081 (into an LA2A) for a more mushey sound, A Sytek (or Neotek MIC MAX with the BROWN BURR OPTION) for a really great top end sound or an Avalon 737 (for an all in one pre).
Combinations are important so experiment. I didn't mention a mic pre I didn't own, (or one I don't recommend)....