I feel John and Ted are worse than Jeff because they didnt admit to their crimes right until their death sentence. and they didnt express any sorrow for killing all those people. they thought of themselves as superior to other people. Jeff on the other hand admitted to all his crimes the moment he was arrested and he knows what he did was wrong. he also said he hated the killing part the most. he enjoyed what he did after. he also tried multiple times to suppress his urges. And the main reason he cooperated with the police was to understand why he did all that and to make sure that the police are able to identify someone like him in the future.
(ofcourse Im not saying that he was a good guy or anything. he deserved the punishment he got. But I believe Ted bundy and John Wayne gacy were much more evil and worse serial killers than Jeff)