Bloodline (Netflix) reminds me of SFU somewhat.
No so much the storybut the family dynamic is pretty similar.

I'm now addicted to Rectify.. and it's all your fault! Haha Thanks for the suggestions!

It's hard to find a show that fills the space of SFU and there's nothing else quite like it. One thing SFU did for me was to heavily invest me in the characters..and make me not want to leave themaside from the excellent writing and acting.
Here's a few that might help;
BSG
was a good choice..although it reminds me more of
LOST
..(which also is a good choice if you haven't watched it. I fell in love with those characters no matter how crazy it got)
Breaking Bad
(if you can find a way to relate to either Walt or Jesse it's excellent)
Rectify
(it's not for everyone and it's a slow burn but if you're into character development it's one of the most haunting shows out there)
Friday Night Lights
(I hated football but loved this show..It's better than you might think even if you're not into football or teenagers)
As far as excellently written or just enjoyableand maybe investing in the characters there's these to try
Ray Donovan
The Americans
Fargo
GOT
Orphan Black
Kingdom (I'm not into MMA but it's a good show with interesting characters)
Outlander
Bloodlines

Nothing, it's pretty overrated.
You should actually try United States of Tara though

I tried so hard to get into Breaking Bad.. But I just couldn't. What the he'll is wrong is with me!? Heehee

If we are talking about well-crafted story-telling, I like
Breaking Bad
, but it's not really similar to SFU and quite dark.
United States of Tara
is a very light drama/comedy.
The Big C

• great story about learning to deal with an approaching death in a funny way.

Never say never

This.

Nice. It really is necessary sometimes, nothing else can quite compete! This was my first time watching the series in quite a few years, and I needed that break but it was so good going back to it. It's like visiting old friendsreally screwed up old friends, who I want to hug and strangle in equal measure, but dear friends nonetheless.
Ill be waiting, with a gun and a pack of sandwiches.

I've been doing the same! Haha
Thanks!

Watch it again.
I just finished a run-through for about the tenth time - I basically had it on loop for a few years after it initially ended, heh - and am still finding new depths and ways to respond to the characters. At the risk of sounding a bit wanky, I think you can only truly appreciate the growth and complexities with multiple viewings.
Ill be waiting, with a gun and a pack of sandwiches.

Transparent is similar to the dysfunctional family themes and have relatable characters. I would go with that, but six feet is still the best.

Thanks!

The closest series I've seen in terms of sheer quality to Six Feet Under were Battlestar Galactica and True Detective. If you want something that feels like 6FU, try Transparent, created and written by one of 6FU's best writers and considered by her to be a "sequel in spirit" to the show. It's fantastic and definitely has a similar feel.

Thanks! Sounds like my style.

Fringe.
It's nothing like Six Feet Under but it has relatable characters that you come to know and love. It has five seasons, with about 22 episodes per season. It's a dark, sci fi show. Very good.

Dexter, with Michael C Hall.
Get the facts first - you can distort them later!

I'm gonna try out Penny Dreadful. Thanks!

I'll pop in an episode via some medium now and then and it really is like seeing old friends. You may want to try Penny Dreadful as I got the same vibe during the finale as I did with this show. After a short while, you become invested in the characters. Another one I liked was Happy Valley as the main cast were all very human with good points and flaws alike.

I appreciate your reply but I'm already a fan and have seen all episodes.

The Walking Dead.