Flux Stereo Tool v3 is my to go stereo image plugin. I love the look of it, and its super easy to use.
Glitchmachines Hysteresis is an amazing glitch delay plugin, which can be used to make some truly unique sounds. I can use hours just pressing the random button, listening to all the weird shit it does to random samples.
Xfer OTT is an essential multiband compressor plugin, super simple to use.
Distorque Audio Azurite is a great multi-voice chorus