verse 4-6 in
Romans 8 shows there are two types of believers (ones who live by the spirit and one who live to the flesh) and these verses end by saying the living in the flesh believer cannot please God.
Rom 8:3... And so he condemned sin in the flesh, 4in order that the righteous requirement of the law might be fully met in us, who do not live according to the flesh but according to the Spirit.5
Those who live according to the flesh have their minds set on what the flesh desires;
but those who live in accordance with the Spirit have their minds set on what the Spirit desires. 6The mind governed by the flesh is death, but the mind governed by the Spirit is life and peace. 7The mind governed by the flesh is hostile to God; it does not submit to God’s law, nor can it do so. 8Those who are in the realm of the flesh cannot please God.
No, there are not two types of believers, there are two type of people: believers and unbelievers, people led by the Spirit and people led by the flesh, minds governed by the Spirit and minds governed by the flesh, those who are hostile and those who are not, those who do not submit to God's law, and those who do, those who can please God and those who cannot.
Those who are believers are led and governed by the Spirit, they are not hostile, they submit to God's law and please him. This is not to say that believers are incapable of sinning, but Paul is not talking about the occasional sin, but rather a way of life, a consistent way of behaving.
Those led by the sinful nature cannot please God: That is not a statement about believer! Believers can and do please God, the momentary lasts of judgement notwithstanding!
Doug