I have seen that it is popular to run spd Slowbro and def Slowking for balanced sets.
There has been some discussion which sets have more combined stats. Just want to point out that Slowbro 16 +def and 240 spdef has a single combined point more than 4 def and 252 +spd. Same for Slowking but 240 def and 16 +spd. This is because 16 +nature is their first softcap point that grants an additional raise.