http://musica.mustdie.ru/en/musicians
you can sort by mp3 or genre. I think you probably find most alike in power, opera and prog-power metal.
If you don't mind a bit harder, more grunts and no power metal (screw those genres anyway) try
epica tthere are some samples on the site. or the old
after forever try something from 'prison of desire' or 'decipher'. I had a good site for af samples but it seems to be ofline now.