The Airhawk works for some folks, but not everyone. And if it's inflated properly, it doesn't really give you any more height.
Some riders use beads, which help, but again, only adds a little height.
Some riders use sheepskin.
And some use Gel pads.
But honestly, none of those really solves the problem entirely. And since they all sit on top of your seat, how you cinch them down is kinda critical. Hate to see something sliding around at speed . . .
The only true solution is to have your seat rebuilt by a custom saddle maker.
There are lots of decent options, and a few poor ones.
My money, and my butt, says just go with Russell Day Long and be done with it.
They will make you a custom saddle based on your weight, inseam, and riding style, and it will be exactly what you need. Custom saddled tend to add some height just by the way they're made, but they can easily build it up a little higher if you need.
Just tell them exactly what you want, send in some pics of you sitting on the bike, and they'll take care of the rest.
You might try some of the cheaper options first, but they won't really solve your problem, and then you'll be looking at a Russell anyway. So just go there first and save yourself a lot of time, money, and hassle
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032
All lower 48 states plus Alaska on the K13GT in two weeks . . .
Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...