thats fair but shes so far ahead of those women in terms of sales and concerts and merchandise its not really close. Intangible opinions are the only way u can make a case for anyone to be ahead of Madonna. Here is a comparison of record sales between those women you namedShe edged Tina out only in popularity at that point in time. I think Tina was much more influential not only bridging the gap between R&B and rock but being a Black female rock vocalist and a popular one.
I'd put a lot of people ahead of Madonna when you consider female musicians like Cher and Barbara Streisand for instance.
Madonna 201.9 million albums sold 75.2 million physical singles 42.1 million downloads/digital TOTAL 319 MILLION UNITS
Cher(solo only) 53.4 million albums sold 46.2 million physical singles 12.2 million downloads/digital TOTAL 111 MILLION UNITS
Barbara Streisand 138.6 million albums sold 35.2 million physical singles 3.68 million downloads/digital TOTAL UNITS 176 MILLION UNITS
Tina Turner(solo only) 59.1 million albums sold 27.9 million physical singles 19.4 million downloads.digital TOTAL UNITS 106 MILLION UNITS
The numbers dont lie Madonna almost sold as many records as all 3 combined she was an absolute monster in terms of sales and thats the name of the game.