I find a lot of these things just lack the weight needed to get in deep.
I like using the handles of small kettlebells - either on the floor, or lying ontop of you
The sleeve or shaft of an oly barbell works well on certain things as well and the weight of the bar itself sinks in deep, good for areas like the quad/hip tie in area
You can even buy small pieces of oly barbell from Rogue fitness to do things with
I have the Battlestar set from Rogue Fitness, a bit pricey but man it gets in deeper than foam rollers for those types of things and more gentle than a barbell.
Just amazing on calves, but kettlebell handles work well there as well
The handles are good for doing your shins etc
https://www.rogueaustralia.com.au/mobilitywod-battlestar-2-0-kits-auWhat price can you put on health?