"It was an important goal for Aaron and an important goal for us", said manager Unai Emery with more than a touch of understatement.
Ramsey also provided a superb through ball to set up Aubameyang's second - and Arsenal's fifth.
The Welshman will be free to hold talks with clubs outside England in January and sign a pre-contract with a view to leaving Arsenal at the end of the season.
The 27-year-old is unlikely to be short of suitors if he does indeed leave the club on a free transfer next year having given a timely reminder of his abilities at Fulham yesterday as he made a starring appearance from the bench.
"The impact he's made in the last few games Iwobi, coming on and he's actually replaced Ramsey and he's made an impact".More news: Kavanaugh makes US Supreme Court debut
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"We have to keep quiet and work like we did before and the season is going well".
The win was Arsenal's ninth in succession in all competitions - their best run since stringing together eight successive wins from March to April 2015 - and put them into the top four.
In fact, only defending Premier League champions Manchester City have scored more goals than Arsenal's tally of 19 in the top flight this term.
Ozil will have the global break to recover in time for the Leicester City clash after retiring from the Germany national team after the World Cup.
Arsenal's Gabonese striker Pierre-Emerick Aubameyang (R) celebrates with Arsenal's French striker Alexandre Lacazette (L) after scoring the team's fourth goal during the English Premier League football match between Fulham and Arsenal at Craven Cottage in London on October 7, 2018.