It's interesting! I think it's also worth saying that a lot of Beatles ballads (as an obvious example people agree are great!) are just swimming in these tricks.
Off the top of my head, quickly resolved dissonances:
'YESTerday / All my troubles seemed so FAR away...'
'ELEANor Rigby...'
'Try to see it MY way...'
'There are places I'll reMEMber ...'
Wide/Octave melody leaps:
I Saw Her Standing There ('held her hand in MINE')
Please Please Me (the chorus *and* the middle 8!)
She Loves You ('woo' just before the choruses)
I Want To Hold Your Hand (again just before the chorus)
Twist and Shout ('aah' etc)
All My Loving (right at the end)
Help ('Won't you PLEASE please help me!')
Hey Jude (just before the chorus bit comes in)
Let It Be (another one of those 'ooh' falsetto bits)
Oh! Darling (scattered around a few times)
Sudden Dynamic / Texture Changes:
Actually I can't think of that many of these... 'Yesterday' with the strings is the most obvious one
I suppose you can have 'Come Together' and 'She's So Heavy' as well even if they're not really ballads as you normally imagine them...
Surprises in general though, frankly you could come up with dozens in nearly every song, that's why they're The Beatles