A 6-4-1 Notre Dame and a 7-4 Alabama (who they lost to). Nebraska was good that year though. But that was the complaint, one which Georgia Tech had a problem with also when not in a conference. In a conference, teams rise and fall. As an independent, PSU played 6 or 7 safe games and on years that the few power teams they played were off, it really became a one or two game season.
Looks pretty reasonable to me. No different than the top teams today really.
From 1976-1993 as an Independent they played:
1976: Played the #1, #2, #15 ranked teams
1977: Played the #10, #15 ranked teams
1978: Played the #2, #5, #6, #15 ranked teams
1979: Played the #6, #11, #15 ranked teams
1980: Played the #3, #4, #9, #10 ranked teams
1981: Played the #1, #6, #8, #15 ranked teams
1982: Played the #1, #2, #4, #5, #13(twice) ranked teams
1983: Played the #1, #3, #4, #13, #17, and #19 ranked teams
1984: Played the #2, #5, #9, #18 ranked teams
1985: Played the #3, #7, #10 ranked teams
1986: Played the #1, #2 ranked teams
1987: Played the #7, #13, #14, #19 ranked teams
1988: Played the #1, #7 ranked teams
1989: Played the #1, #6, #13, #19(twice) ranked teams
1990: Played the #1, #6, #11 ranked teams
1991: Played the #2, #8, #10, #12 ranked teams
1992: Played the #2, #8, #13, #20 ranked teams
1993: Played the #1, #6, #8, #15 ranked teams