He was not a cult of personality the way Trump is. There is nobody who can follow him. The GOP is no longer fostering a clear successor like they used to. You can see this in how well Trump-endorsed candidates do in their elections. Even when they win, they under perform, because Trump voters want the man himself, not his lackeys.
For every L Ron Hubbard (where the organization goes on without him more or less as it was), there are a hundred Oneida cults (where the leader being jailed left the group a shadow of what it was).