Clearly the 12-35 and 12-60 are the wrong lenses for you..........................
In spite of the fact a 24 has been one of my principal fl's
for 40+ years, its too soon to pick up a wide prime. The
7-14 is not a solution. I tend to shoot wide and close,
single object, usually with depth, is the main focus.
Perspective distortion below 12mm fl is difficult for me
to handle well.
You would prolly looooove my 10-22/3.5-4.5. It has none
of the problems that plague you. It's a very respected EF-s
ultrawide zoom. Used for m4/3 its relatively problem-free
outer regions are outside the format and you're left with a
20-44 [=FF] FoV that is better than ANY native m4/3 WA
zoom. Your beloved 24mm [=FF] FoV is in its sweet spot.
When on sale the 10-22 is about $400. An adapter is about
$150. You may hafta pluck off the rubber ring on the rear
element, depending on which adapter you get. You will be
impressed by this lens, end to end, for m4/3 !
I also use the 10-18/4.5-5.6 which is about 1/2 the size and
weight of the 10-22, and 1/2 the price. It's physique is more
attuned to m4/3, especially the smaller bodies. I'm unable to
part with either of them in favor of the other. No problem ...
cuz neither one represents much money tied up.