Another master at pitch bends on keys is Chick Corea. However, neither Chick nor in my opinion Ray Charles are demonstrating 'realistic midi guitar slides', great pitch bending notwithstanding.
If you take a look/listen to the link I posted from Amplesound - there is at least one example of a multi-fret slide where the note instantiations happening due to the sliding across frets that happens in a real guitar, is happening. IMO, there's a big difference between pitch bending and guitar neck slide simulation.
This is a demo of a midi guitar 'slide':
https://soundcloud.com/ample-sound/3-2-5-slidesmootherhere's another:
https://soundcloud.com/ample-sound/3-2-4-sioAgain, these are MIDI examples using Amplesound's VSTi engine. In my opinion, this is the most clear demonstration of MIDI guitar slides that sound realistic.
For that matter, I believe that this company has the most realistic acoustic and electric guitar MIDI sample/VSTi available, by quite a long shot compared to anything else. The articulations that they have available, including these slides, are quite amazing in my opinion.
I've always been of the mindset that to get realistic guitar via MIDI, it had to be done with a real player or loops like realtracks. However, watching/listening to the demos from Amplesound has decreased my strength of opinion in that regard. These are dang close and in some respects better than what you can get out of some local hired-in guitar players - but you had better be really good with your keyboard playing/nuancing with whatever tools Amplesound provides to add in the realism.
Here's some electric guitar slides that IMO are pretty danged spot-on:
https://soundcloud.com/ample-sound/agg-80s-solohere's some great jazz guitar bends using one of their electric guitar bends - ala Doc Powell and others:
https://soundcloud.com/ample-sound/agp-scotts-smooth-jazz-demoNo affiliation with this company, but I was just wowed by their midi guitar stuff - slides included. I've heard some pretty convincing bend simulations before, but not slides like this.
-Scott