Your 3 Lens System for the OMD

my prima lens setup

12/2,0
25/1,4
75/1,8

small version

14/2,5
45/1,8

Cheap zoom version:

14-150
20/1,7
45/1,8

more expensive

14-150
25/1,4
77/1,8

another option

12-35
45 macro or 45/1,8 or 60 macro or 75/1,8
100-300

why not:

12-50
35-100/2,8
20/1,7 or 25/1,4

largest range

7-14
14-150
100-300

many options in mFT world