Would this stocklist work?

The only thing you might have to watch is the puffers. Some say you can mix them, some say no. But honestly minus the lion (which you wisely eliminated already) no real worries.

Yeah, they get big. They could also turn the clowns into dinner, although that would be iffy as well. I have seem them rip up fish before. Mine got his rear handed to him by a domino damsel (he couldn't get ahold of it, or it would have been bye-bye little fishy). Domino ended up back at lfs.

Don't know much about picassos so I cant tell you much there, but I have had a niger and undulated trigger before. The niger tried to eat my yellow tang starting with the fins and the lfs I traded the undulated into 4 yrs ago still has it and has named it satan (guess they have sold it 4 times, each time it goes to its new home, kills all, and ends back up at the store. The last brave person to try him had a huge panther grouper, they said somewhere between 1.5-2 ft, and I guess the undulated shot in out of the rocks and attacked him until he hid in the corner of the tank). I do know picassos are alot less aggresive than undulateds so someone with more exp. will have to chime in on that.