Supernotoes can do all of that. Available through One-Click. Among other things, you can make token art, avatar art, or art embedded in the Bio page appear whispered to GM or sent directly to player-visible chat. Examples are in the thread. Also, if you want to build a library of NPC art slideshow that displays in chat and doesn't take up one byte of your library storage, check out this macro generator from the Stupid Tricks thread: NPC Directory and Slideshow