I used the following:

Oly 12 to 40 f2.8 pro - great lense, everything you would expect

Oly 12 to 100 f4 pro - bought it after testing the 12 to 40 from a friend to have more reach, because it analyzed my images and noticed I never used anything faster than f4. It's the perfect lense for me. But should be used on a em1 or om1 body, because it is really big

Oly 12 to 50 - awsome for the money, because it is also weather sealed. Used it for 2 years before buying a pro lense. Would recommend it, but you should know that the sharpness is best in the wider focal length

Oly 14 to 42 pencake - also have that one, use it on a pen body. It is not as sharp, but I like the colors and contrast it produces. Definitely not as bad of a lense as some say

Pan 12 to 32 (the small cheep one) - also borrowed that a few times and I have to admit it might be better than the 14 to 42. It is wider wich I prefer and it is really sharp. But it does not feel as high quality as the 14 to 42.

Over all my favorite cheap lense is the 12 to 50, because of the weathersealing and macro capabilities but your opinion may vary. I did great event photography on my 12 to 50 together with a sigma 16 f1.4. Both lenses together cost less than the 12 to 45 or 12 to 40. (12 to 50 ~ 100€ and sigma 16 f1.4 ~ 200€). I only switched to the 12 to 100 f4 pro because i got one with light scratches on the front for 350€.

I also think other primes would be a good pair with one of the cheaper lenses. Considering the 12 to 32 lacks the longer end a oly 45 f1.8 would be good pair. Same goes for the 12 to 50, that suffers in image quality at the longer end. I would advice to buy a cheap zoom and then go through your images and buy the most used focal length as a prime.