Any Yaoi where the seme is Rich and all?

Royal Fiance

Lots and lots of them.. I would suggest you go and check this list from Baka-Updates
https://www.mangaupdates.com/showtopic.php?tid=11502

Rich seme

http://www.mangago.me/read-manga/sonna_me_de_mite_kure/
http://www.mangago.me/read-manga/akunin_o_nakaseru_houhou/
http://www.mangago.me/read-manga/ouji_no_hakoniwa/
http://www.mangago.me/read-manga/uchi_no_ko_ni_narinasai/
http://www.mangago.me/read-manga/sick/
http://www.mangago.me/read-manga/retsujou/
http://www.mangago.me/read-manga/mad_cinderella/
http://www.mangago.me/read-manga/joushi_to_ore_no_himitsu/
http://www.mangago.me/read-manga/kowarekake_no_omocha/
http://www.mangago.me/read-manga/saa_koi_ni_ochitamae/
http://www.mangago.me/read-manga/hisho_ikuseichuu/
http://www.mangago.me/read-manga/hisho_ikuseichuu_dj_hisho_to_oishii_gohan/
http://www.mangago.me/read-manga/hisho_ikuseichuu_dj_sweet_private_secretary/
http://www.mangago.me/read-manga/hidamari_ga_kikoeru/
http://www.mangago.me/read-manga/ouji_to_kotori/
http://www.mangago.me/read-manga/mou_kimi_o_matanai/