I'm still gonna say it. Get Andre Drummond.
10-15 minutes a game, more physical than Kornet, much better rebounder, and he's also putting together a very good December so far (averaging 8/8 in about 14 minutes a game, as well as 1-2 blocks/game). You don't need to "rely" on him in the playoffs but the guy can eat up minutes the rest of this season + provide some toughness in the postseason that we no longer have with G-Will gone.
He only makes 3.3M this season so you can easily acquire him for a few seconds + the Grant TPE
In the playoffs you'll have to go through most of Turner, Giannis, Embiid, Bam, Orlando's bigs, and possibly Jokic or AD if they reach the Finals. Yes they have Porzingis/Horford but an insurance big would be vital too. G-Will functioned as that even when they had Horford/Timelord for stretches and held up well.