Here I want to gather some of the schematics I use in my main world. Sources for the schematics are either the wiki, youtube videos or my own construction. I play bedrock edition on Nintendo Switch, so I'm only going to link relevant schematics.
Simple auto furnace
In most of my bases there is always one of these, it allows for easy dropping of up to 5 stacks of smeltable items in the topmost hopper, which gets smelted and transported using the bottom hopper into the chest on the left. Which often is a double chest at the bottom of a column of chests.
The optional hopper on the right can be filled with the fuel of your choice, I mostly use coal or charcoal, as I often smelt smaller quantities of items, and don't want to waste fuel.
The crafting table on the top is not necessary, but I find it to be a convenient location. If you want to be able to turn this furnace setup off, you can place a lever on the crafting table (or whatever block you have in this position), and it can toggle the entire setup.
Item sorter
This item sorter addresses some of the randomness with Hoppers in bedrock, which according to silentwisperer is due to presence of the Repeater. The design is silent, as the hopper won't move due to the obsidian. The topmost hopper is the input hopper chain, the middle hopper (which needs to face _into_ the block to its right (or left)) is the filter hopper, and finally the lower hopper is the one going into your chest.
Note that this will stop letting items through at 45 items, so you need to add 44 filler items in the rightmost part of the filter hopper, and the one you want to sort on as a single item in the first slot. Do also remember that when building these next to each other, to never add more than 45 items to any filter hopper as that would allow for the neighboring filter hoppers to start letting items through.