At least the efforts made by Benzema while at Real Madrid have yielded very good results and have been his best contribution at Real Madrid.
Unfortunately, at the moment, there is still no one who can replace Benzema at Real Madrid because the task is very difficult and not everyone can replace him easily.
It's not easy to replace someone who has contributed a lot with a club like Benzema at Real Madrid. But that does not mean there will never be players who are capable of being in the line of Benzema at the Real Madrid club, because over time there will definitely be a player who will become like Benzema at Real Madrid. Although it probably won't be in the near future as Real Madrid currently prefers to recruit young players so a replacement that can look like Benzema may not be immediately seen next season at Real Madrid.