@ZeCircle I would like to suggest Crucial 2 by Vazkii!
Also RLCraft is really hard and also beefy af, wouldn't recommend that as a main Server but more as an additional one.
As some others have pointed out, Fabric is much better today for all the new hardware etc. but there aren't many mods yet, forge has much more. which doesn't mean that there aren't any good ones tho.
for example, I'm using most of the mods in this list: https://whatifgaming.com/best-minecraft-fabric-mods/
English and German (for now) speaking non-official Minecraft & Minetest instance. For everyone who plays Minecraft, this instance is a mast!