for me its Disturbed for its raw and intense delivery (from the beginning!). Henk is similar but in a Musicals style. Both are great. Good stuff.
I think this comment from someone captures it best:

Distorted gets RAW & VISCERAL … grabs me by the brain, heart, guts & ovaries (!!) He delivers a feast to be eaten with your hands and no table manners required .. Henk is a MASTER .. absolutely superb & MAGNIFICENT He delivers a gourmet meal to savour every mouthful - with some 'civilised' decorum! Life requires both.

And agree with you on Floor Janssen, very special singer with a great voice.