I bought a Agfa Click I for the same reason. But it has several downsides compared to the Holga:
* Fixed focus (I belive that 4 meters is the closest)
* No bulb setting
* No usable flash sync (unless you are using the dedicated bulb flash)
* Mine is not very sharp anywhere, compared to the Holgas relatively sharp center. Its just an even unsharpness to it.
However, it is not useless. Some pros:
* 1/30 shutterspeed and f/8.8 makes it about three stops less hungry for light than the Holgas 1/100 f/13.
* I like how it looks
* The lens' character might prove useful for B/W landscapes. I've given up on it for portraits though.
Regarding Kodak Brownies I've only used a Six-20 E. I like it a lot but it is far from a Holga or even lofi (imho). I'm not clear about you wanting the Holga look or just the ease of operation.
Pros:
* 1/30 and f/11 makes it roughly two stops less light hungry than the Holga
* The 100/11 meniscus lens is really good. Not mural prints but have a look here:
https://www.flickr.com/photos/cl3mens/tags/kodakbrowniesix20e/
* Built in portrait lens (3-6 feet) and yellow filter
* Bulb, cable release and tripod socket
Cons:
* You have to respool your film.
An older Brownie might give you a more lofi look, but remember that these cameras (and many others, like Agfa) were made to perform as good as possible in factories with higher QC than Holgas (and they did not stick a wide angle lens on them that barely covers the format). But I like Holgas, don't get me wrong. A Holga with a 80 or 90 mm lens would probably be a lot less fun (fun fact: they are using a 90 on the 120PAN for 6x12 - and it looks like it struggles to cover 6x9).