Yeah, I often wish Irmin was more audible
Especially on their live bootlegs, though he's actually featured pretty prominently on the recording of Damo's last show w/ them. Michael and Jaki are my favorites (which is why I tend to focus on them, though they're often simply mixed the highest) but yeah, I love Irmin's approach- his little cascading flourishes and sparkly tones reminds me a bit of George Duke from "Roxy" era Zappa but w/ more of a modern classical bent. Incredible musician (but then, all members of Can were).
Oh and Irmin's also the star of these 2: