He would be the ones to attend the class vs He will be the ones to attend the class

Some examples from the web:

• You know, I'd kind of hoped that he would be the one eulogizing me.
• He knew that he would be the one.
• Might have known that you would be the one to sleep in.
• When your father told me that you would be the one to carry the child, I...
• Always thought the robots would be the ones to rise up.
• It's only you would be the one to terminate me.
• I have to say I'm a little surprised that you of all people would be the one to suggest this plan.
• Hodgins would be the one to know if stones would have any evidentiary value.
• It's only appropriate that you would be the one to terminate me.
• It's only appropriate that you would be the one to terminate me.
• I thought he hated me, but he hid it in Morse code so that I would be the one to find it.
• It's only appropriate that you would be the one to terminate me.
• There he asked - and was given permission - to attend one of the abbot's talks.
• But I thought that, when it was your turn, that you would be the one to hold the strings.
• If whoever get attacked by the bear in the Central Park we would be the one to know what to do.
• That's my life, but I thought that... ...that when it was your time, you would be the one to hold the strings.
• The NC Forum shall nominate one National Coordinator from among its members to attend General Assembly meetings, and one to attend CST meetings.
• If he is really unable to attend, one of these deputies should at least be present.
• But as much as you can define... a perfect man... I believe that he would be the one that...
• It would be the one honest thing we've done in years.

Some examples from the web:

• He will be the one to whom congratulations are due.
• He will be the one saying that word.
• I will be the one to kill Sarah Newlin.
• And if something happens to our father... I will be the one to take it.
• Perhaps... you will be the one to stop it.
• And now you... darling will be the one to suffer.
• Well, Dr. Elizabeth Weir will be the one to begin official negotiations with you.
• I will be the one to fill all the emptiness.
• And how perfect that Sarah Jane Smith will be the one to lead Earth into a rich and fertile future.
• Not to fear, White... if there's a scandal in the Pentagon, yours truly will be the one to find it.
• And I'm happy that you will be the one to explain.
• I'm afraid Edith will be the one to care for us in our old age.
• They will be the ones to free themselves from her.
• Consumers will be the ones to lose out, if a flow of competitive and innovative products is stifled.
• There is much more to be said on this subject, but perhaps other Members will be the ones to say it.
• There he asked - and was given permission - to attend one of the abbot's talks.
• I will be the one to bring you the misery you deserve.
• The Parker child will be the one to bring together all the elements to create the vaccine which will destroy us.
• When Burrows brings Scylla back to us, I will fly it safely back to Los Angeles, and you will be the one to put a bullet in his brain.
• The Parker child will be the one to bring together all the elements...