I think his look (if his Wikipedia picture and the tiny images from a Google search) is probably not particularly harmful. It's well-positioned to signal Dignified Hippy, which is a group that tends to be skeptical of the general anti-deathist position, or for a general Respectable Elder, which is not wonderful but pretty decent for appealing to institutional-investor-type groups. I'm not familiar enough with his particular relevance to know whether that balance could be improved for what he actually does.