Exhibit 99.8 CONSENT OF PERSON ABOUT TO BECOME A DIRECTOR Pursuant to Section 230.438 of Regulation C promulgated under the Securities Act of 1933, as amended, the undersigned hereby consents to her being named in the Proxy Statement-Prospectus, which forms a part of the Registration Statement on Form S-4 relating to the proposed merger of Landmark Bancshares, Inc. and MNB Bancshares, Inc. with and into Landmark Merger Company, as a person who is expected to become a director of Landmark Merger Company, upon the consummation of such merger. As of the effective time of the Registration Statement, the undersigned will not be a member of the Board of Directors of Landmark Merger Company and will not be required to sign the Registration Statement. May 23, 2001 /s/ Susan E. Roepke ------------------------------------- Susan E. Roepke