you're only options are IE and iCab You may be able to find a version of netscape out on the intarweb but I'm not sure it will be any better then IE (feature wise).
You may want to try Classilla. It's an attempt to update Mozilla for 2009 on the classic Mac OS. It is a work in progress so it will have problems. Using this alongside iCab would give you a fairly complete browsing experience.
Though I do not know what you will do for accessing Flash based sites.