The first question would obviously be what is a striker?
As there are many players that exist somewhere in-between categories — going by your list alone I already see Eusébio, Stoichkov & Rummenigge that I wouldn't categorise as strikers, at least not at their peak (Stoichkov had played as one for Bulgaria but his peak would still be as a left-sided wing forward). It's easier with those forwards that preferred wider areas but categorising old-fashioned inside forwards is a huge pain — take Puskás (pre-Madrid), Kocsis, Greaves, Law that usually played as an inside forward and not as a central striker in those 5-men attacking lines... especially when there's not a lot of footage to make a proper judgment.
So here's a bunch of players that often played as an inside forwards/support strikers, usually being their team's main goalscorers, that I don't count as strikers: Puskás, Di Stéfano, Eusébio, Pelé, Rummenigge, Stoichkov, Blokhin, Cristiano, Baggio, Kempes... some of them played as strikers early on (like Pelé) or later (like Puskás, Cristiano) throughout their careers but I want to focus on players' peak versions even though those limited versions of Pelé or Puskás can easily get a spot in top-5.
T1:
Gerd Müller, Luís Ronaldo, Marco van Basten
It's really a coin-toss between the three for the GOAT title for me. Müller is the only one that had been able to perform at his peak level for a long time without injuries getting in his way — I don't think it's an outlandish claim to state that both Ronaldo & van Basten could've secured that top spot for themselves if their careers weren't defined by their injuries. It's important to say that when I talk about Ronaldo I talk about his version from 1996 to 1999, before his knees gave up at the age of 23
Van Basten was able to perform at the highest level for longer even though he had missed entire seasons due to his injuries, finally retiring at the mere age of 28.
T1,5 (#4)
Romário
I can't put him in the first tier but he's done enough to be singled out as the closest runner up. If you compare their overall careers it probably won't even be a stretch to say that he was a better player than Luís Ronaldo but the latter's peak was just too special. Up until 23 he was on the trajectory to become not simply the greatest striker of all-time, but arguable the greatest player ever — and that includes Pelé, Maradona and, later, Messi. If Romário was a bit more professional he probably would've ended up in tier 1 anyway.
T2:
Uwe Seeler, Denis Law, Sándor Kocsis, Thierry Henry, Andriy Shevchenko // probably Luis Suárez & Robert Lewandowski, I always find it hard to evaluate current players
T3:
Jimmy Greaves, Alberto Spencer, Luigi Riva, Karim Benzema, Gabriel Batistuta // by reputation alone, Arsenio Erico, Silvio Piola, Dixie Deane, Gunnar Nordahl, Josef Bican
T4:
Preben Elkjær, Jürgen Klinsmann, Alan Shearer, John Charles, Ruud van Nistelrooy, Samuel Eto'o, Zlatan Ibrahimović
T5:
Just Fontaine, Robin van Persie, Sergio Agüero etc. (there's going to be quite a few)
I'd take Rossi & Papin out from your list, despite their Ballon d'Or wins I don't think that their career justify a place higher than T4. Same with Sanchez.