Mr Bungle was definitely an important band to me while I was in high school. Especially that album "California', and helped me start a journey. As for more weirdo bands, The Residents are insane...they are a strange synth/art band that have been around since the 70's and are still kicking. Video of The Residents :
.Another band to check out is Ween, some stuff is more normalish, but their stuff is delightfully messed up. Ween :
The first video is The Residents. A Strange synth-weirdo band from the 70's till today. And The 2nd video "Happy Colored marbles" by Ween. These are two of my favorite weirdo bands (Mr.Bungle definitely is another major one). Enjoy!