Steinberg - Virtual Guitarist 2
For Electric Guittar, I would choose Virtual Guitarist 2. It produces very realistic sound and use very less CPU. It is available in both Windows and MAC version. It's consist of two separate vsts - Virtual Acoustic Guitar and Virtual Electric Guitar. It has about 1.5 GB of Acoustic and Electric Guitar Samples and it's easy to use.
Here is the screenshots of Virtual Electric Guitar
You can listen the track made through this plugin.
Native Instruments - Guitar Rig 4
First of all it is not an instrument but effect which works on any instruments. It has thousands of presets to generate different sound of Electric Guitar. Generally it is used in acoustic guitar so that it produces realistic sounds.
Image-Line - Hardcore.
Hard core is also an effect not an instrument plugin and it can be used on any instruments.