custom blocks for datapacks

Hi,

I am looking for a block that
1. refer to existing block (for hitbox and main behavior)
2. hold any amount of tags (extend its behavior)
3. carries a name as block state (carries texture)
4. carries a uid as block state (extend its behavior)

I just started with datapacks, hard to do a few ideas by copy 10 states from 10 blocks combining them into one. If 1. is empty it would be nice, if the block could be insivisible, pushable with piston, full block, no hitbox.