You can DENY VIEW ANY DATABASE (REVOKE is not enough) and make the user the database owner (different than being in the db_owner Role) of the database:

USE [master]

GO

DENY VIEW ANY DATABASE TO [YourServerLogin];

GO

USE [YourDatabase]

GO

-- note: the server login cannot be mapped to a database user. if the login is mapped to a

-- user you first have to drop the user before making the login the database owner

-- also note: a database can only have one owner so this technique only works if each login

-- has its own database and the login should have full control over that database

ALTER AUTHORIZATION ON DATABASE::[YourDatabase]TO [YourServerLogin]

GO

edit: fix dbo