I mostly agree with the list of top metal bassists in the link below. Although, I would add Alex Webster (Cannibal Corpse), Dick Lovgren (Meshuggah), Victor Brant (Entombed) and Sean Yseult because I know that she can hold her own with any of these dudes! Bass wizards unite! 

http://www.rottenbass.com/the-six-most-astounding-metal-bassists-108

Rest easy Cliff!

Sean Yseult