Well, you could try Nevermore. It's not exactly the same, but it fits the category of clean vocals at the very least.
I used to be in a similar position, but really, after you listen to enough gutteral vocals you begin to get used to it, and after a while you can start to differentiate between bad gutteral vocals and good gutteral vocals. There is a difference, trust me. If you want to try to get in to gutteral vocals, just so you can listen to, like, every modern metal band, I would suggest listening to Testament's first 3 albums (The Legacy, The New Order, and Practice What You Preach), and if you like those, then download their later album The Gathering. After their singer got older and recovered from throat cancer, they switched to a sort of hybrid of thrash and death vocals. 'Eyes of Wrath' from that album was the song that made death metal vocals finally make sense to me. If you're not interested, then nevermind, but it worked for me so I figured I'd suggest it!