FT was different. It was inherited by a girl who clearly never had combat training, and was caught by surprise. In addition, the FT powers aren't combat based, while the Attack Titan is primarily a combat based Titan Form.
Grisha would not have won against >Colossal Titan>Armoured Titan>Female Titan>Jaw Titan (assuming he found them before he got eaten)
Note, that each of the titans has been defeated individually, not in a group. Female got beaten in a 1v1, Colossal got beaten by the SC after being separated from Armoured Titan