Is it known which titans follow in power to the Founding Titan? In the last episode of the anime, season 3 episode 6, it's stated that the Founding Titan is the most powerful of all titans. Is it known where all or any of the other titans are in the scale of power among them?
It is noted that the Founding Titan is the strongest one.
It isn't known in the manga/anime how the Titans are ranked, but statistics do exist for certain titans.
Colussus Titan Statistics spoilers below

Power 11/10
Speed 3/10
Size 11/10
Elusiveness 10/10
Threat 10/10

Armored Titan Statistics spoilers below

Power 8/10
Speed 6/10
Hardness 11/10
Machoness 10/10
Legend 10/10

Female Titan Statistics spoilers below

Power 6/10
Speed 8/10
Hardness 10/10
Combat 11/10
Sexiness 10/10

Beast Titan Statistics spoilers below

Power 7/10
Speed 5/10
Ruthless 8/10
Smart 11/10
Wildness 10/10