The threshold for induction remains at 75% of all who voted on the appropriate ballot.
Jackson was also voted to the Baseball Hall of Fame in 1993 on the first ballot.
Most of his supporters voted for Weir, the winning candidate, on the third and final ballot.
Williams, the National League's rookie of the year in 1961, was voted into the hall in his sixth year on the ballot.
Only Wyoming was left to vote, with only three delegates, all of whom had voted for Kiel on the first ballot.
But voting on the composite ballot can be challenging.
Voters in Rafah were allowed to vote for 15 of the 70 candidates on the ballot.
However, members must meet specific judging standards and can vote on the final ballot each season only if they have met their responsibilities for that complete year.
"The Missouri delegation is pledged to vote for Grant on the first ballot."
Ghislain Lebel asked his supporters to vote for Boisclair on the second ballot.