Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_202_45 ( id number, "rank" number, "wrestler" text, "no. of reigns" number, "combined days" number )

### Question ###
who has spent more time as nwa world heavyyweight champion , gene kiniski or ric flair ?

### Accurate SQL ###

SELECT "wrestler" FROM table_202_45 WHERE "wrestler" IN ('gene kiniski', 'ric flair') ORDER BY "combined days" DESC LIMIT 1