Giacinto Scelsi
The Piano Works 1, Louise Bessette, piano
mode 92

These Scelsi pieces have an impressive spectrum of tone-landscaping transformations. He is particularly good at drawing out melody sequences at very slow tempos, often separating them with judiciously placed cluster-pylons. He's also great at using folkish, jagged, rapturously self-deconstructing rhythmic events.

Seems accessible and way out there at the same time, a combination of qualities I love.