Customer Success Manager (or Director or VP … you get the point)
Customer Service Manager (legit, but not on point)
Customer Account Manager (no points; read the question again)
Strategic Account Manager (whose strategy?)
Renewals Manager (minus one)
Customer References Manager (and who does that benefit, hmm?)
Customer Advocacy Manager (getting warmer; depends on who’s advocating for whom)
Chief Customer Officer (partial credit)
Other (specify title)
Would love to hear a bunch of answers. It would also be helpful if you mention whether your company is B2B or B2C (or both) and whether your revenue stream is recurring subscription or one-time purchase.