Don't forget you have Guitar Pro Tabs (thousands), if you don't have Guitar Pro you can use TuxGuitar that will convert to midi it also has a batch converter under the Tools menu.
And as mentioned you can load Guitar Pro Tabs in Ample VST's and the free Ample and drop the phrases into RapidComposer and it will play all the GP articulations over any chord or octave.

You have Midi Mutator that is included in RapidComposer or separate.


Drop a MIDI pattern on MIDI Mutator to start transforming it into a new original pattern! Fully replace or slightly modify the rhythm with a single click. Experiment with other chord voicings, or replace the chords. Bass lines, chord patterns work equally well. The new MIDI sequence can be dragged directly to your DAW, or stored with a single click.

• regenerate the rhythm using 6 rhythm generator algorithms from RapidComposer, plus a new one that preserves exact note and rest lengths, suitable for modern genres
• use rhythm from another MIDI file
• slice a pattern, then rearrange slices randomly
• displace notes randomly, randomize note positions and/or lengths
• extend, widen, randomize chord voicings, replace the chord progression
• change the beat positions to change the feel
• replace or randomize accents
• increase/decrease polyphony
• randomize pitches
• for monophonic phrases: change the contour, add connecting notes.
• simple activation. No internet connection is required for activation or operation