[quote name='blue' timestamp='1488997420' post='3253624']
Me too, I will simplify the bass line which allows me to sing.
Blue
[/quote]
Simplify is good, but there are other solutions too.
If you listen to Macca's bass line on All My Loving, it's clear that he starts the descending run from high on the G string and plays almost the entire piece above the 7th fret across all four strings.
If you watch any of the live clips of him playing it in the early 60s (concert footage obviously, but also TV shows in the UK, Germany and Scandinavia are very helpful) he plays the whole thing down by the nut, making it far easier to check his positions by feel without having to think too much about it.