“Teddy Bear” was the second 45 I ever bought (the first being “Convoy”). For those who aren’t familiar, it came out at the height of the 1970s CB radio phenomenon, and was about a sick little boy, whose father had died, and who talked with truckers on his CB radio; the boy’s dream was to take a ride in a semi. Extremely sappy, for sure. 
That one always reminds me of @Sampiro’s tribute to his mom. I can’t listen to it anymore.
Lee Marvin singing Wand’rin Star:
Aw. It always makes me think of that De Niro movie Bang the Drum Slowly, and it makes me cry.
Here are my 3.
The Hollies - He Ain’t Heavy, He’s My Brother - YouTube
Say Hello 2 Heaven (25th Anniversary Mix) - YouTube
One of my mother’s favorites. Bad Company - Silver, Blue And Gold - YouTube
Okay, you’ve forced me to pull out the big gun. You don’t need to be a Scouser or football fan to catch something in your throat when you hear:
But if you aren’t there’s the original, an audio Capcha testing whether you are a robot (skip ahead to around 3:23):
An on-field recording of Liverpool fans singing that song during a match appears at the end of Pink Floyd’s “Fearless” (they fade in at around 4:40):
There is absolutely NOTHING sappy about this song.
I’m encouraged that no one mentioned Bobby Goldsboro’s Honey.
I’ve always disliked that song, but it may be the definition of sappy.
Years ago, humor columnist Dave Barry asked readers to send in their nominations for the worst song ever. Several readers nominated “Honey,” with one of them stating, “Bobby never caught on that he could have bored a hole in himself and let the sap out.” 
I have long felt it odd that Pink Floyd, a London band, would play that, a Liverpool song.
Which just goes to shiw not everything PF did was good. 
Best video of that song ever! Thanks. My granddaughter listened, then started singing along, carrying it forward at least two generations.
Yeah, guess which song here i’ve played at least six times today?
Good songs, love them. I want to add “Undercover Angel”.
Mario Lanza singing a lullaby: Guardian Angels.
The contrast between the “all stops out” sections and the restrained sections of this lullaby are amazing.
AND, I just found out who composed it:
If you’re going to reach back for songs composed by famous comedians, this one always hits me in the feels.
I read an article by or about Allen Sherman where he talked about the nice older guy next door who loved gardening. Without the fright wig and trademark clothes – and talking – he didn’t recognize the Arthur Marx next door was Harpo.
Not a truck song, but I’ll offer “Old Dogs and Children and Watermelon Wine,” by Tom T. Hall, to complete the trifecta. A guy in a Miami bar gets life advice from the janitor.