Posting a probably incomplete list as a CW answer. (So that other users can improve it.)
Where the statistics on various sites are different, the numbers given here follow Wikipedia.
JB More than 805 goals according to RSSSF in all competitive matches. This probably includes 34 international goals.
GM He scored 655 goals according to Wikipedia, but this includes 92 goals in Bezirksliga Schwaben and Regionalliga Süd.
LM As of 22 May 2021. Goals scored for Barcelona B and Barcelona C in lower level competitions are not counted here.
CR As of 19 May 2021.
IS According to Wikipedia, he scored 417 goals in club appearances and 59 international goals.
EW He scored 554 goals in official matches according to RSSSF.
EUSOnly goals for Benfica -the rest of his carrer he played outside of Europe.
ZIAs of 9 May 2021. 53 goals scored for LA Galaxy are not counted here.
LSAs of 16 May 2021. 12 goals for Nacional de Montevideo are not counted here.
RLAs of 22 May 2021. 41 goals for Lech Poznań, 103 goals for Borussia Dortmund and 294 goals for Bayern Munich.