find the name of the user who gives 1 rank
SELECT T1.name FROM useracct AS T1 JOIN review AS T2 ON T1.u_id   =   T2.u_id where T2.rank = 1
user who gives 1 rank refers to filtering on rank = 1 in the review table; joining user account table (useracct) with review table (review) on user ID (u_id) to get the user's name;