My Dad used to talk about being at the 1946 Derby game, I have the programme for it.
Biggest Ive been in at VP was the 62,500 for Man U semi 1970/71.
The Santos game from memory was about 57,000, and the Southampton 1969 cup game mentioned was about 59,000.
If you want really big Villa crowds ( not at VP admittedly), how about the 100,000 we used to get regularly for our league cup finals in the 1970s.
Also, we used to take this old fella to the games who had gone to the 1905 FA cup final. Official attendance 101,117, not including the ones you can see in the trees !