Who? Well, allow me to introduce you to The Mermen. Don't be too quick to turn up the sound.
They're an instrumental trio who began around 1990 as a sort of neo-surf band, but they've gone far afield from that, though you can still hear some of it in their sound, which at times might be described as Dick Dale meets Jimi Hendrix. Their web site calls it "psychedelic instrumental ocean music," and says that the band's name was derived from the Jimi Hendrix song/soundscape "1983 (A Merman I Should Turn to Be").
Thomas is the guitarist, and along with bassist Allen Whitman and drummer Martyn Jones the Mermen make music that is both fierce and melodic. Their 1995 album A Glorious Lethal Euphoria is one of my all-time favorite albums, period. The opening track from it, "Pulpin' Line", is the one I really wanted to use instead of the preceding track, but the album version is not on YouTube. There are some decent live performances of it, but they don't have the same intensity, and the sound quality is not so great.
Here's something from that album. Again, don't be quick to turn up the sound.
They aren't always fast and loud and noisy; sometimes they're slow and loud and noisy, and sometimes they're even quiet. "And the Flowers They'll Bloom", all nearly-ten-minutes of it, is a showcase for the expressive power of an electric guitar and a rack full of effects.
There is a strangely mystical quality about the album, as is suggested by the cover (what you see in the two "videos" above), and by some of the song titles: "The Drowning Man Knows His God," "With No Definite Future and No Purpose Except to Prevail Somehow." Other titles are just whimsical, often somewhat bent, e.g. "Scalp Salad."
The Mermen seem to have become a sort of cult California jam band. Until a few minutes ago, when I looked at their web site, I didn't think they'd released an album since 2000's Amazing California Health and Happiness Road Show, but there is a more recent one, In God We Trust. I like Road Show but I'll be surprised if they ever surpass Euphoria. If you like what I've posted here, get it--you won't be sorry. (The first track is from Songs of the Cows, a less-than-full-length follow-up to Euphoria and sounds very much like it, and is almost as good.)