Mumbojumbo mob farm :
https://www.youtube.com/watch?v=YA2siTV5s4Q

BLOCKS : LOTS
DISPENSER : 60
REDSTONE : 350
REDTORCH : 40
WATER BUCKET : 60
HOPPER : 2
STICKY PISTON : 4

52 high (1+3+3+3+3+3+35+1)

Shulkercraft Iron golem farm :
https://youtu.be/xDJtXznj8Fg

42 - Building Block 
41 - Glass
26 - Wall
8 - Ladder
9 - Trapdoor
8 - Sign
5 - Hopper
4 - Repeater
3 - Composter
2 - Redstone dust 3- Bed
2 - Water Bucket
1 - Lava Bucket
1 - Chest
1 - Piston
1 - Redstone Torch 1 - Name Tag
64 - Temporary Block

(~15 height)