It's interesting to look box office numbers adjusted for inflation (Infinity War is no. 35):
1 Gone with the Wind MGM $1,850,728,800 $198,676,459 1939^
2 Star Wars Fox $1,631,575,500 $460,998,007 1977^
3 The Sound of Music Fox $1,304,524,800 $158,671,368 1965
4 E.T.: The Extra-Terrestrial Uni. $1,299,385,700 $435,110,554 1982^
5 Titanic Par. $1,241,636,300 $659,363,944 1997^
6 The Ten Commandments Par. $1,199,960,000 $65,500,000 1956
7 Jaws Uni. $1,173,202,000 $260,000,000 1975
8 Doctor Zhivago MGM $1,137,080,800 $111,721,910 1965
9 The Exorcist WB $1,013,088,400 $232,906,145 1973^
10 Snow White and the Seven Dwarfs Dis. $998,440,000 $184,925,486 1937^
11 Star Wars: The Force Awakens BV $990,334,300 $936,662,225 2015
12 101 Dalmatians Dis. $915,242,000 $144,880,014 1961^
13 The Empire Strikes Back Fox $899,334,600 $290,475,067 1980^
14 Ben-Hur MGM $897,680,000 $74,000,000 1959
15 Avatar Fox $891,355,700 $760,507,625 2009^
16 Return of the Jedi Fox $861,584,200 $309,306,177 1983^
17 Jurassic Park Uni. $839,255,900 $402,453,882 1993^
18 Star Wars: Episode I - The Phantom Menace Fox $827,258,600 $474,544,677 1999^
19 The Lion King BV $816,581,200 $422,783,777 1994^
20 The Sting Uni. $816,548,600 $156,000,000 1973
21 Raiders of the Lost Ark Par. $811,058,000 $248,159,971 1981^
22 The Graduate AVCO $783,883,700 $104,945,305 1967^
23 Fantasia Dis. $760,678,200 $76,408,097 1941^
24 Jurassic World Uni. $724,090,700 $652,270,625 2015
25 The Godfather Par. $722,930,700 $134,966,411 1972^
http://www.boxofficemojo.com/alltime/adjusted.htm