Bigger keys may be more of a hassle than you might think. You have probably built up a lot of muscle memory with the current keysizes. Changing those sizes and distances may be annoying.
Alternatively, you could go for a heavier or more tactile switch. Buy I imagine you have tried this already. Personally accidental keypresses are only an issue for me when I am using reds. I thought I would get used to it, but it remains a problem, and it is one of the reasons why I sold my board with reds.