Slide/negative scanners that can cope with anything other than 35mm film are hard to come by tend to be expensive. When searching for a suitable scanner it would help to know the film format(s) you'll have to handle. (e.g. 120 roll film). This might help:
https://en.wikipedia.org/wiki/Film_format
Then you'll be able to search for, say, '120 film scanner' (Most scanners for larger slide/negative sizes can cope with 35mm as well. Some, but not all, can also scan prints). A search for 'medium format film scanner' is also worth a try but remember that there are several different 'medium formats', so do check that your choice of scanner can cope with the film size(s) involved.
If you can find a PlusTek OpticFilm 120 scanner for a decent price on eBay (or similar) it would probably be ideal for you but, at over £1000 new, it's a massive outlay if you can't pick one up secondhand.
https://plustek.com/gbr/products/film-photo-scanners/opticfilm-120/index.php
Assuming that your needs don't go beyond scanning prints, 35mm film, 120 film and 220 film though, the Epson Perfection V550 Photo Scanner might be ideal for your requirements:
https://www.epson.co.uk/products/scanners/consumer-scanners/perfection-v550-photo
It's cheaper than the recommended price if you buy it on Amazon:
Amazon.co.uk User Recommendation