Who won the first ever nrl grand final?
2015 - The North Queensland Cowboys' first premiership after 21 seasons in the NRL and widely regarded as one of the all-time best (along with the Raiders' '89 win). The first all-Queensland NRL grand final sparked talk of future deciders being held in Queensland. It was also notable as Brisbane Broncos ended their biggest drought from a grand final since entering the competition (in 1988) and it was Bennett's first season back in Brisbane after leaving in 2008. North Queensland Cowboys winger Kyle Feldt scored a try from a Michael Morgan try-assist after the full-time siren to level the game at 16-all. After Jonathan Thurston missed the sideline conversion, hitting the right post, the match went to golden point extra time, the first grand final to do so. The Kyle Feldt kick-off to begin golden point was dropped by the Broncos' Ben Hunt. From the ensuing set of six, Thurston kicked the winning field goal, and was subsequently awarded the Clive Churchill Medal. It also ended Brisbane's undefeated streak in grand finals, having won all six previous deciders.
Who won the first official NRL Grand Final?
Brisbane Broncos
NRL Grand Final
No context provided
Who won the first NRL grand final, including NSW state titles?
South Sydney
List of NRL Grand finals
https://en.wikipedia.org/wiki/List%20of%20NRL%20Grand%20finals
NRL Grand Final
https://en.wikipedia.org/wiki/NRL%20Grand%20Final
The 1998 NRL season was the 91st season of professional rugby league football in Australia, and the inaugural season of the newly formed National Rugby League (NRL)
1998 NRL season
The 1998 NRL grand final 
1998 NRL season
was to be the first grand final under the National Rugby League
1998 NRL season
the Broncos scored 28 unanswered points in the second half, winning 12–38
1998 NRL Grand Final
he Brisbane Broncos against the Canterbury Bulldogs
1998 NRL Grand Final
The New South Wales Rugby League ran the major rugby league competition of New South Wales from its inception in 1908 until 1994
National Rugby League
The team went on to win the inaugural premiership then successfully defended their title in the 1909 season, winning the Grand Final by default
South Sydney Rabbitohs
The 1998 NRL season was the inaugural season of the newly formed National Rugby League or NRL. The 1998 NRL grand final was the first ever grand final under the National Rugby League, and the Brisbane Broncos emerged victorious. In this1998 grand final, the Brisbane Broncos scored 28 unanswered points in the second half to defeat the Canterbury Bulldogs 38 to 12. Prior to this from 1908 until 1994, the New South Wales Rugby League ran the major league rugby competition in New South Wales. The South Sydney Rabbitohs won the inaugural New South Wales Rugby League premiership by winning the grand final in 1908 and then successfully defended their title in the 1909 season, winning the grand final by default.