I think RE4 was the most visually stunning with RE1 remake coming a close second. RE4 oozed so much style it was outstanding. RE5 may be "technically" "better" but it is so boring and fails to bring across the horror aspect of the games in any meaningful way. There is the occasional section of 5 which is good but only because it harkens back to the earlier RE style.
When RE1 remake came out it was like "Woah how amazing does this game look I never thought I'd see a game looking this good".







