I don't know if you know Peter Hollens, he does a capella covers and only uses his voice and mouth to make any other sound accompanying the voice. I thought it might be useful since anyone could accompany the song in some way, even those who don't know how to sing or can't reach some notes.
Amazing Grace
Amazing grace, how sweet the sound
That saved a wretch like me
I once was lost, but now am found
Was blind, but now I see
'Twas grace that taught my heart to fear And grace my fears relieved
How precious did that grace appear
The hour I first believed
When we've been there ten thousand years
Bright shining as the sun
We've no less days to sing God's praise Than when we first begun
Amazing grace, how sweet the sound
That saved a wretch like me I once was lost, but now am found
Was blind, but now I see
O comme, o comme Emmanuel
O come o come emmanuel
And ransom captive israel
That mourns in lonely exile here
Until the son of god appears
Rejoice rejoice
Emmanuel shall come to thee oh israel
Oh come thou day-spring come and cheer
Our spirits by thine advent here
Disperse the gloomy clouds of night
And death's dark shadows put to flight
Rejoice rejoice
Emmanuel shall come to thee oh israel
Les Miserables medley
On my own... pretending he's beside me
All alone, i walk with him til morning
Without him, the feel his arms around me
And when i lose my way i close my eyes
And he has found me
In the rain, the pavement shines like silver
All the lights are misty in the river
In the darkness the trees are full of starlight
And all i see him and me forever and forever
Oh my friends my friends forgive me
That i live and you are gone
There's a grief that can't be spoken
There's a pain goes on and on
Phantom faceas at the window
Phantom shadows on the floor
Empty chairs at empty tables
Where my friends will meet no more
Oh my friends my friends don't ask me
What your sacrifice was for
Empty chairs at empty tables
Where my friends will sing no more...
Bring him peace... bring him joy
He is young... he is only a boy
You can take, You can give
Let him be, let him live
If i die, let me die
Let him live, bring him home
The hanging tree
Are you, are you
Coming to the tree
They strung up a man
They say who murdered three
Strange things did happen here
No stranger would it be
If we met at midnight
In the hanging tree
Those are 4 of my favorites songs from him, there are more easy songs on his YouTube channel but I wasn't sure if you want some specific types of songs or some specific lyrics or both.