By successful, I assume you mean guided by conservative principles (Obama is a successful President by his own standards).
If Trump leads this country guided by conservative principles, I would be thrilled. Absolutely thrilled, and I would work very hard for his re-election.
Reagan wasn't a perfect conservative or a perfect president. IMO, that's just part of life.
It took 60 years, by my reckoning, to get us where we are now. Those who insist we can get it all back in one swing don't understand where we are or how we got here...remembering that the biggest problem wasn't that there was an Obama but that he could be elected to two terms.