The Range treat their staff badly, the reviews on Glassdoor are terrible, Wilko treated their staff well, they had a low staff turnover for retail and the average time there was 10 years which is unusual for retail. The Range also seem expensive for some things at the same time as the stock looking tacky, I was looking on their website and some of the prices were expensive for what they were.
I'm mourning Wilko as well, I got so much from there, it was always good quality and cheap for what it was. I don't want to pay Next, John Lewis prices when I can get it for less elsewhere. And it had everything, great gardening section, stationary, DIY stuff was great, paint and houseware was also good. Poundland/B&M may be cheaper but the stuff isn't as good quality so you can end up needing to buy twice. They are ok for beauty/cleaning products/food as you don't need them to last but check pricing as the packs can be smaller. I buy beauty products from Superdrug/Boots when they are on offer.
I've started going to Argos for the bigger things like towels as the quality is pretty good, similar to Wilko and they have quite a lot of house stuff and some DIY stuff. Toolstation and Screwfix, B&Q, Homebase for DIY. M&S is sometimes cheaper than you expect for some house stuff. Try Dunelm for house stuff too. The Works have cheap stationary and crafting items, it doesn't look as good quality but it's reasonably priced. Not sure where I'm going to get my gardening things, I haven't solved that issue yet, nowhere compares to Wilko for range and price, garden centres can be more expensive.
You probably don't have one near you (unless you are in Wales), but Charlies has some similar stock and they are online: www.charlies.co.uk/