Top ones would have to be:

* Amazing Grace
* The Blood Will Never Lose It's Power
* Rock of Ages, Cleft For Me

Two that many will not know, so I've included the words, are:

* Follow Me, by Ira Stanfill

I traveled down a lonely road and no one seemed to care, the burden on my weary back had bowed me to despair; I oft complained to Jesus how folks were treating me, and then I heard Him say so tenderly: "My feet were also weary up on the Calv'ry road, the cross became so heavy, I fell beneath the load; be faithful weary pilgrim, the morning I can see-just lift your cross and follow close to Me."

"I work so hard for Jesus"-I often boast and say-"I’ve sacrificed a lot of things to walk the narrow way; I gave up fame and fortune-I’m worth a lot to Thee!" and then I hear Him gently say to me: "I left the throne of glory and counted it but loss, My hands were nailed in anger up on a cruel cross; but now we’ll make the journey with your hand safe in Mine- so lift your cross and follow close to Me."

O Jesus, if I die upon a foreign field some day, ‘Twould be no more than love demands- no less could I repay; "No greater love hath mortal man than for a friend to die"- these are the words He gently spoke to me: "If just a cup of water I place within your hand, then just a cup of water is all that I demand;" But if by death to living they can Thy glory see, I’ll take my cross and follow close to Thee.

and

* "The Blood That Stained The Old Rugged Cross", by Carl Smith -

On the cross of Calvary our blessed Saviour died,
Gave His life to save the world from loss;
In His pain and agony, for every sin to hide,
Shed the blood that stained the old rugged cross.

'Twas His blood, His precious blood that stained the old rugged cross,
'Twas His love that paid the awful cost;
Oh soul so far astray come and plunge today
In the blood that stained the old rugged cross.

To the cross, the rugged cross, they nailed His precious hands
And in death He fully paid the cost,
There is pardon in His love for everyone that stands
For the blood that stained the old rugged cross.

What an awful death He died to pardon you and me,
All alone in agony He tossed,
And a world once lost in sin can now be wholly free
By the blood that stained the old rugged cross.
'Twas His blood, His precious blood that stained the old rugged cross,
'Twas His love that paid the awful cost;
Oh soul so far astray come and plunge today
In the blood that stained the old rugged cross.