Yeah goaltending would go a long way. At the same time it can be a crap shoot. Plenty of teams spend $5-10m on their goaltending and still have goaltending issues. Realistically I think the Kings will likely be looking at something like this:
PLD - Byfield - Kempe
Fiala - Kopitar - Thomas/Fagemo
Moore - Danault - Laferriere
Lee - Helenius - Lewis
Anderson - Doughty
Gavrikov - Spence
XX (Martinez?) - Clarke
XX (Saros/Ullmark please)
Portillo / Rittich
I'd say that's likely a playoff team but probably not a contender. In which case it probably doesn't make a ton of sense to go out and acquire/sign a true #1 goalie this offseason... If this is more/less your opening night lineup the smart move is probably to treat next year as a building year. You see how Byfield looks in a full season back at center (preferably on the 1st line). See how Fagemo or Thomas look with a prolonged trial in the top 6 / top 9. See how guys like Helenius and Lee look at the NHL level in a 4th line role. See how Clarke looks as a regular. See if you can't get PLD back to producing at a semi-respectable rate. Then focus on making the changes needed to build a contender based on what you've seen (or launch into a re-tool / rebuild if what you've seen sucks lol).