John Evan was the first but I think the current one is Andy Giddings. There has always been a mixture of piano and keyboard type stuff on their albums. There is a great variety from the classical type piano playing, like the intro to 'Locomotive Breath' to the 80's synthesizer riffs, like 'Steel Monkey'. Impossible to pin them down, that's their charm, some strum-a-long chordy types songs, some heavy metal riffy types stuff and some sensitive plinky-plonky stuff.