Abbey Road by The Beatles had 81 weeks on the chart. It entered at number 1 starting an 11 week run on October 4th.
The Beatles eponymous album, usually known as The White Album, entered at number 1 on December 7th 1968 for 7 weeks, staying on the chart for 22 weeks.
The Best of The Seekers returned to number 1 for 2 weeks on March 29th. It started a 4th spell on top on April 19th for a week, staying on the chart for 117 weeks.
Diana Ross & The Supremes Join The Temptations, reached number 1 on February 15th for 4 weeks and charted for 15 weeks.
Bob Dylan reached top spot on May 24th with Nashville Skyline. It stayed at number 1 for 4 weeks and on the chart for 42.
Goodbye by Cream reached number 1 on March 15th for 2 weeks and spent 28 weeks on the chart. It returned to top spot twice in April for 1 week each time on the 12th and 26th.
Jim Reeves topped the chart from July 12th for 4 weeks with According To My Heart, staying on the chart for 14 weeks.
Jethro Tull and Stand Up reached number 1 on August 9th for 3 weeks with 29 weeks on the chart. It returned to top spot for two further weeks on September 6th.