looking for mech anime similiar to aldnoah zero

ok to be more clear i'm looking for mech anime where the protagonist survive/wins becouse he actualy have some skill and not becouse he have the op mech or some superopower and pass half of the series oneshootting armyes of critters weaker mech



note:

looking for mech vs mech or similiar, not mech vs giant monster or the like



if there is also romance is plus..specialy if it gets some conclusion



i'm fine with ecchi or more mature content and also with blood/gore but i will automaticaly drop a anime if a female character is subject to rape



an happy ending would also be a plus



this begin said the main point of the search is decent mech fights and as said if half of the series is just MC oneshotting critters mech becouse he have the OP machine and have a on pair opponent only in like 2/10 episodes than i will pass



thank you in advance

looking for mech anime similiar to aldnoah zero